docs: update CLAUDE.md to reflect current codebase

Add ForewordParser pipeline step, document all Song/SongLine fields,
Foreword type, ForewordPage variant, BookConfig subtypes, all ChordPro
directives, and new Configuration section for songbook.yaml options.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -35,16 +35,17 @@ Requires Java 21 (configured in `gradle.properties`). Kotlin 2.1.10, Gradle 9.3.
 
 ## Architecture
 
-**Pipeline:** Parse → Measure → Paginate → Render
+**Pipeline:** Parse → Validate → Measure → Paginate → Render
 
 `SongbookPipeline` (in `app`) orchestrates the full flow:
 1. `ConfigParser` reads `songbook.yaml` → `BookConfig`
-2. `ChordProParser` reads `.chopro` files → `Song` objects
-3. `Validator` checks config and songs
-4. `MeasurementEngine` calculates each song's height in mm using `FontMetrics`
-5. `TocGenerator` estimates TOC page count and creates entries
-6. `PaginationEngine` arranges songs into pages (greedy spread packing)
-7. `PdfBookRenderer` generates the PDF via OpenPDF
+2. `ChordProParser` reads `.chopro`/`.cho`/`.crd` files → `Song` objects
+3. `ForewordParser` reads optional `foreword.txt` → `Foreword` (if configured)
+4. `Validator` checks config and songs
+5. `MeasurementEngine` calculates each song's height in mm using `FontMetrics`
+6. `TocGenerator` estimates TOC page count and creates entries
+7. `PaginationEngine` arranges songs into pages (greedy spread packing)
+8. `PdfBookRenderer` generates the PDF via OpenPDF
 
 **Module dependency graph:**
 ```
@@ -62,14 +63,39 @@ app, parser ← gui (Compose Desktop)
 
 ## Key Types
 
-- `Song` → sections → `SongLine` → `LineSegment(chord?, text)` — chord is placed above the text segment
-- `PageContent` — sealed class: `SongPage`, `FillerImage`, `BlankPage`
+- `Song` → sections → `SongLine` → `LineSegment(chord?, text)` — chord is placed above the text segment. Also has `aliases`, `lyricist`, `composer`, `key`, `tags`, `notes: List<String>`, `references: Map<String, Int>` (bookId → page), `capo`
+- `SongLine` — holds `segments` plus optional `imagePath` (when set, the line is an inline image)
+- `Foreword` — `quote`, `paragraphs`, `signatures` — parsed from a plain-text file
+- `PageContent` — sealed class: `SongPage`, `FillerImage`, `BlankPage`, `ForewordPage`
 - `SectionType` — enum: `VERSE`, `CHORUS`, `BRIDGE`, `REPEAT`
+- `BookConfig` — top-level config with `FontsConfig`, `LayoutConfig`, `TocConfig`, `ForewordConfig`, `ReferenceBook` list. `FontSpec.file` supports custom font files. `LayoutConfig.metadataLabels` (`"abbreviated"` or `"german"`) and `metadataPosition` (`"top"` or `"bottom"`) control metadata rendering
 - `BuildResult` — returned by `SongbookPipeline.build()` with success/errors/counts
 
 ## Song Format
 
-ChordPro-compatible `.chopro` files: directives in `{braces}`, chords in `[brackets]` inline with lyrics, comments with `#`. See `songs/` for examples.
+ChordPro-compatible `.chopro`/`.cho`/`.crd` files: directives in `{braces}`, chords in `[brackets]` inline with lyrics, comments with `#`. See `songs/` for examples.
+
+**Metadata directives:** `{title: }` / `{t: }`, `{alias: }`, `{lyricist: }`, `{composer: }`, `{key: }`, `{tags: }`, `{note: }`, `{capo: }`
+
+**Section directives:** `{start_of_verse}` / `{sov}`, `{end_of_verse}` / `{eov}`, `{start_of_chorus}` / `{soc}`, `{end_of_chorus}` / `{eoc}`, `{start_of_repeat}` / `{sor}`, `{end_of_repeat}` / `{eor}`. Section starts accept an optional label. `{chorus}` inserts a chorus reference, `{repeat}` sets a repeat label.
+
+**Notes block:** `{start_of_notes}` / `{son}` … `{end_of_notes}` / `{eon}` — multi-paragraph rich-text notes rendered at the end of a song.
+
+**Inline image:** `{image: path}` — embeds an image within a song section.
+
+**Reference:** `{ref: bookId pageNumber}` — cross-reference to a page in another songbook (configured in `reference_books`).
+
+## Configuration
+
+`songbook.yaml` at the project root. Key options beyond the basics:
+
+- `fonts.<role>.file` — path to a custom font file (TTF/OTF) for any font role (`lyrics`, `chords`, `title`, `metadata`, `toc`)
+- `layout.metadata_labels` — `"abbreviated"` (M:/T:) or `"german"` (Worte:/Weise:)
+- `layout.metadata_position` — `"top"` (after title) or `"bottom"` (bottom of last page)
+- `toc.highlight_column` — abbreviation of the reference-book column to highlight (e.g. `"CL"`)
+- `foreword.file` — path to a foreword text file (default `./foreword.txt`)
+- `reference_books` — list of `{id, name, abbreviation}` for cross-reference columns in the TOC
+- `songs.order` — `"alphabetical"` or `"manual"` (file-system order)
 
 ## Test Patterns
 

app/src/main/kotlin/de/pfadfinder/songbook/app/SongbookPipeline.kt

@@ -2,6 +2,7 @@ package de.pfadfinder.songbook.app
 
 import de.pfadfinder.songbook.model.*
 import de.pfadfinder.songbook.parser.*
+import de.pfadfinder.songbook.parser.ForewordParser
 import de.pfadfinder.songbook.layout.*
 import de.pfadfinder.songbook.renderer.pdf.*
 import mu.KotlinLogging
@@ -27,9 +28,12 @@ class SongbookPipeline(private val projectDir: File) {
             return BuildResult(false, errors = listOf(ValidationError(configFile.name, null, "songbook.yaml not found")))
         }
         logger.info { "Parsing config: ${configFile.absolutePath}" }
-        val config = ConfigParser.parse(configFile)
+        val rawConfig = ConfigParser.parse(configFile)
 
-        // Validate config
+        // Resolve font file paths relative to the project directory
+        val config = resolveFontPaths(rawConfig)
+
+        // Validate config (including font file existence)
         val configErrors = Validator.validateConfig(config)
         if (configErrors.isNotEmpty()) {
             return BuildResult(false, errors = configErrors)
@@ -80,6 +84,19 @@ class SongbookPipeline(private val projectDir: File) {
 
         logger.info { "Parsed ${sortedSongs.size} songs" }
 
+        // 2b. Parse foreword (if configured)
+        var foreword: Foreword? = null
+        val forewordConfig = config.foreword
+        if (forewordConfig != null) {
+            val forewordFile = File(projectDir, forewordConfig.file)
+            if (forewordFile.exists()) {
+                logger.info { "Parsing foreword: ${forewordFile.absolutePath}" }
+                foreword = ForewordParser.parseFile(forewordFile)
+            } else {
+                logger.warn { "Foreword file not found: ${forewordFile.absolutePath}" }
+            }
+        }
+
         // 3. Measure songs
         val fontMetrics = PdfFontMetrics()
         val measurementEngine = MeasurementEngine(fontMetrics, config)
@@ -89,14 +106,25 @@ class SongbookPipeline(private val projectDir: File) {
         val tocGenerator = TocGenerator(config)
         val tocPages = tocGenerator.estimateTocPages(sortedSongs)
 
-        val paginationEngine = PaginationEngine(config)
-        val pages = paginationEngine.paginate(measuredSongs, tocPages)
+        // Foreword always takes 2 pages (for double-sided printing)
+        val forewordPages = if (foreword != null) 2 else 0
 
-        val tocEntries = tocGenerator.generate(pages, tocPages)
+        val paginationEngine = PaginationEngine(config)
+        val pages = paginationEngine.paginate(measuredSongs, tocPages + forewordPages)
+
+        val tocEntries = tocGenerator.generate(pages, tocPages + forewordPages)
+
+        // Build final page list with foreword pages inserted before song content
+        val allPages = mutableListOf<PageContent>()
+        if (foreword != null) {
+            allPages.add(PageContent.ForewordPage(foreword, 0))
+            allPages.add(PageContent.ForewordPage(foreword, 1))
+        }
+        allPages.addAll(pages)
 
         val layoutResult = LayoutResult(
             tocPages = tocPages,
-            pages = pages,
+            pages = allPages,
             tocEntries = tocEntries
         )
 
@@ -124,13 +152,39 @@ class SongbookPipeline(private val projectDir: File) {
         )
     }
 
+    /**
+     * Resolves font file paths relative to the project directory.
+     * If a FontSpec has a `file` property, it is resolved against projectDir
+     * to produce an absolute path.
+     */
+    private fun resolveFontPaths(config: BookConfig): BookConfig {
+        fun FontSpec.resolveFile(): FontSpec {
+            val fontFile = this.file ?: return this
+            val fontFileObj = File(fontFile)
+            // Only resolve relative paths; absolute paths are left as-is
+            if (fontFileObj.isAbsolute) return this
+            val resolved = File(projectDir, fontFile)
+            return this.copy(file = resolved.absolutePath)
+        }
+
+        val resolvedFonts = config.fonts.copy(
+            lyrics = config.fonts.lyrics.resolveFile(),
+            chords = config.fonts.chords.resolveFile(),
+            title = config.fonts.title.resolveFile(),
+            metadata = config.fonts.metadata.resolveFile(),
+            toc = config.fonts.toc.resolveFile()
+        )
+        return config.copy(fonts = resolvedFonts)
+    }
+
     fun validate(): List<ValidationError> {
         val configFile = File(projectDir, "songbook.yaml")
         if (!configFile.exists()) {
             return listOf(ValidationError(configFile.name, null, "songbook.yaml not found"))
         }
 
-        val config = ConfigParser.parse(configFile)
+        val rawConfig = ConfigParser.parse(configFile)
+        val config = resolveFontPaths(rawConfig)
         val errors = mutableListOf<ValidationError>()
         errors.addAll(Validator.validateConfig(config))
 

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

layout/src/main/kotlin/de/pfadfinder/songbook/layout/MeasurementEngine.kt

@@ -15,9 +15,16 @@ class MeasurementEngine(
         // Title height
         heightMm += fontMetrics.measureLineHeight(config.fonts.title, config.fonts.title.size) * 1.5f
 
-        // Metadata line (composer/lyricist)
+        // Metadata lines (composer/lyricist) - may be 1 or 2 lines depending on label style
         if (song.composer != null || song.lyricist != null) {
-            heightMm += fontMetrics.measureLineHeight(config.fonts.metadata, config.fonts.metadata.size) * 1.8f
+            val metaLineHeight = fontMetrics.measureLineHeight(config.fonts.metadata, config.fonts.metadata.size) * 1.8f
+            val useGerman = config.layout.metadataLabels == "german"
+            if (useGerman && song.lyricist != null && song.composer != null && song.lyricist != song.composer) {
+                // Two separate lines: "Worte: ..." and "Weise: ..."
+                heightMm += metaLineHeight * 2
+            } else {
+                heightMm += metaLineHeight
+            }
         }
 
         // Key/capo line
@@ -43,26 +50,44 @@ class MeasurementEngine(
 
             // Lines in section
             for (line in section.lines) {
-                val hasChords = line.segments.any { it.chord != null }
-                val lyricHeight = fontMetrics.measureLineHeight(config.fonts.lyrics, config.fonts.lyrics.size)
-                if (hasChords) {
-                    val chordHeight = fontMetrics.measureLineHeight(config.fonts.chords, config.fonts.chords.size)
-                    heightMm += chordHeight + config.layout.chordLineSpacing + lyricHeight
+                if (line.imagePath != null) {
+                    // Inline image: estimate height as 40mm (default image block height)
+                    heightMm += 40f
+                    heightMm += 2f  // gap around image
                 } else {
-                    heightMm += lyricHeight
+                    val hasChords = line.segments.any { it.chord != null }
+                    val lyricHeight = fontMetrics.measureLineHeight(config.fonts.lyrics, config.fonts.lyrics.size)
+                    if (hasChords) {
+                        val chordHeight = fontMetrics.measureLineHeight(config.fonts.chords, config.fonts.chords.size)
+                        heightMm += chordHeight + config.layout.chordLineSpacing + lyricHeight
+                    } else {
+                        heightMm += lyricHeight
+                    }
+                    heightMm += 0.35f  // ~1pt gap between lines
                 }
-                heightMm += 0.35f  // ~1pt gap between lines
             }
 
             // Verse spacing
             heightMm += config.layout.verseSpacing
         }
 
-        // Notes at bottom
+        // Notes at bottom (with word-wrap estimation for multi-paragraph notes)
         if (song.notes.isNotEmpty()) {
-            heightMm += 1.5f  // gap
-            for (note in song.notes) {
-                heightMm += fontMetrics.measureLineHeight(config.fonts.metadata, config.fonts.metadata.size) * 1.5f
+            heightMm += 1.5f  // gap before notes
+            val metaLineHeight = fontMetrics.measureLineHeight(config.fonts.metadata, config.fonts.metadata.size) * 1.5f
+            // A5 content width in mm = 148 - inner margin - outer margin
+            val contentWidthMm = 148f - config.layout.margins.inner - config.layout.margins.outer
+
+            for ((idx, note) in song.notes.withIndex()) {
+                // Estimate how many wrapped lines this note paragraph needs
+                val noteWidthMm = fontMetrics.measureTextWidth(note, config.fonts.metadata, config.fonts.metadata.size)
+                val estimatedLines = maxOf(1, kotlin.math.ceil((noteWidthMm / contentWidthMm).toDouble()).toInt())
+                heightMm += metaLineHeight * estimatedLines
+
+                // Paragraph spacing between note paragraphs
+                if (idx < song.notes.size - 1) {
+                    heightMm += metaLineHeight * 0.3f
+                }
             }
         }
 

layout/src/test/kotlin/de/pfadfinder/songbook/layout/MeasurementEngineTest.kt

@@ -324,4 +324,40 @@ class MeasurementEngineTest {
         // Should be the same since no reference books are configured
         heightWith shouldBe heightWithout
     }
+
+    @Test
+    fun `inline image adds significant height`() {
+        val songWithImage = Song(
+            title = "With Image",
+            sections = listOf(
+                SongSection(
+                    type = SectionType.VERSE,
+                    lines = listOf(
+                        SongLine(listOf(LineSegment(text = "Line before"))),
+                        SongLine(imagePath = "images/test.png"),
+                        SongLine(listOf(LineSegment(text = "Line after")))
+                    )
+                )
+            )
+        )
+        val songWithoutImage = Song(
+            title = "No Image",
+            sections = listOf(
+                SongSection(
+                    type = SectionType.VERSE,
+                    lines = listOf(
+                        SongLine(listOf(LineSegment(text = "Line before"))),
+                        SongLine(listOf(LineSegment(text = "Line after")))
+                    )
+                )
+            )
+        )
+
+        val heightWith = engine.measure(songWithImage).totalHeightMm
+        val heightWithout = engine.measure(songWithoutImage).totalHeightMm
+
+        // Inline image adds ~42mm (40mm image + 2mm gap)
+        val diff = heightWith - heightWithout
+        diff shouldBeGreaterThan 30f  // should be substantial
+    }
 }

model/src/main/kotlin/de/pfadfinder/songbook/model/BookConfig.kt

@@ -7,7 +7,17 @@ data class BookConfig(
     val layout: LayoutConfig = LayoutConfig(),
     val images: ImagesConfig = ImagesConfig(),
     val referenceBooks: List<ReferenceBook> = emptyList(),
-    val output: OutputConfig = OutputConfig()
+    val output: OutputConfig = OutputConfig(),
+    val foreword: ForewordConfig? = null,
+    val toc: TocConfig = TocConfig()
+)
+
+data class TocConfig(
+    val highlightColumn: String? = null  // abbreviation of the column to highlight (e.g. "CL")
+)
+
+data class ForewordConfig(
+    val file: String = "./foreword.txt"
 )
 
 data class BookMeta(
@@ -41,7 +51,9 @@ data class LayoutConfig(
     val margins: Margins = Margins(),
     val chordLineSpacing: Float = 3f,    // mm
     val verseSpacing: Float = 4f,         // mm
-    val pageNumberPosition: String = "bottom-outer"
+    val pageNumberPosition: String = "bottom-outer",
+    val metadataLabels: String = "abbreviated",  // "abbreviated" (M:/T:) or "german" (Worte:/Weise:)
+    val metadataPosition: String = "top"  // "top" (after title) or "bottom" (bottom of last page)
 )
 
 data class Margins(

model/src/main/kotlin/de/pfadfinder/songbook/model/Foreword.kt

@@ -0,0 +1,7 @@
+package de.pfadfinder.songbook.model
+
+data class Foreword(
+    val quote: String? = null,
+    val paragraphs: List<String> = emptyList(),
+    val signatures: List<String> = emptyList()
+)

model/src/main/kotlin/de/pfadfinder/songbook/model/Layout.kt

@@ -10,6 +10,7 @@ sealed class PageContent {
     data class SongPage(val song: Song, val pageIndex: Int) : PageContent()  // pageIndex 0 or 1 for 2-page songs
     data class FillerImage(val imagePath: String) : PageContent()
     data object BlankPage : PageContent()
+    data class ForewordPage(val foreword: Foreword, val pageIndex: Int) : PageContent()  // pageIndex 0 or 1 for multi-page forewords
 }
 
 data class LayoutResult(

model/src/main/kotlin/de/pfadfinder/songbook/model/Song.kt

@@ -23,7 +23,10 @@ enum class SectionType {
     VERSE, CHORUS, BRIDGE, REPEAT
 }
 
-data class SongLine(val segments: List<LineSegment>)
+data class SongLine(
+    val segments: List<LineSegment> = emptyList(),
+    val imagePath: String? = null  // when non-null, this "line" is an inline image (segments ignored)
+)
 
 data class LineSegment(
     val chord: String? = null,  // null = no chord above this segment

parser/src/main/kotlin/de/pfadfinder/songbook/parser/ChordProParser.kt

@@ -25,6 +25,17 @@ object ChordProParser {
         var currentLabel: String? = null
         var currentLines = mutableListOf<SongLine>()
 
+        // Notes block state
+        var inNotesBlock = false
+        var currentNoteParagraph = StringBuilder()
+
+        fun flushNoteParagraph() {
+            if (currentNoteParagraph.isNotEmpty()) {
+                notes.add(currentNoteParagraph.toString().trim())
+                currentNoteParagraph = StringBuilder()
+            }
+        }
+
         fun flushSection() {
             if (currentType != null) {
                 sections.add(SongSection(type = currentType!!, label = currentLabel, lines = currentLines.toList()))
@@ -37,6 +48,27 @@ object ChordProParser {
         for (rawLine in lines) {
             val line = rawLine.trimEnd()
 
+            // Inside a notes block: collect lines as paragraphs
+            if (inNotesBlock) {
+                if (line.trimStart().startsWith("{") && line.trimEnd().endsWith("}")) {
+                    val inner = line.trim().removePrefix("{").removeSuffix("}").trim().lowercase()
+                    if (inner == "end_of_notes" || inner == "eon") {
+                        flushNoteParagraph()
+                        inNotesBlock = false
+                        continue
+                    }
+                }
+                if (line.isBlank()) {
+                    flushNoteParagraph()
+                } else {
+                    if (currentNoteParagraph.isNotEmpty()) {
+                        currentNoteParagraph.append(" ")
+                    }
+                    currentNoteParagraph.append(line.trim())
+                }
+                continue
+            }
+
             // Skip comments
             if (line.trimStart().startsWith("#")) continue
 
@@ -97,6 +129,21 @@ object ChordProParser {
                     "end_of_repeat", "eor" -> {
                         flushSection()
                     }
+                    "image" -> if (value != null) {
+                        // Inline image within a song section
+                        if (currentType == null) {
+                            currentType = SectionType.VERSE
+                        }
+                        currentLines.add(SongLine(imagePath = value.trim()))
+                    }
+                    "start_of_notes", "son" -> {
+                        inNotesBlock = true
+                    }
+                    "end_of_notes", "eon" -> {
+                        // Should have been handled in the notes block above
+                        flushNoteParagraph()
+                        inNotesBlock = false
+                    }
                     "chorus" -> {
                         flushSection()
                         sections.add(SongSection(type = SectionType.CHORUS))

parser/src/main/kotlin/de/pfadfinder/songbook/parser/ForewordParser.kt

@@ -0,0 +1,96 @@
+package de.pfadfinder.songbook.parser
+
+import de.pfadfinder.songbook.model.Foreword
+import java.io.File
+
+object ForewordParser {
+
+    /**
+     * Parses a foreword text file into a [Foreword] object.
+     *
+     * Format:
+     * - Lines starting with `> ` are collected as the quote (multiple lines joined)
+     * - `---` is a horizontal rule separator (marks end of quote section)
+     * - Lines starting with `-- ` are signatures
+     * - Other non-blank lines are body text; blank lines separate paragraphs
+     */
+    fun parse(input: String): Foreword {
+        val lines = input.lines()
+
+        val quoteLines = mutableListOf<String>()
+        val signatures = mutableListOf<String>()
+        val paragraphs = mutableListOf<String>()
+
+        var currentParagraph = StringBuilder()
+        var inQuote = true  // Start assuming we might be in the quote section
+        var foundSeparator = false
+
+        for (rawLine in lines) {
+            val line = rawLine.trimEnd()
+
+            // Quote lines (before separator)
+            if (!foundSeparator && line.trimStart().startsWith("> ")) {
+                quoteLines.add(line.trimStart().removePrefix("> "))
+                continue
+            }
+
+            // If we had quote lines but now see non-quote content before separator,
+            // the quote section is done
+            if (!foundSeparator && quoteLines.isNotEmpty() && line.trimStart().isNotEmpty() && !line.trimStart().startsWith("> ")) {
+                if (line.trim() == "---") {
+                    foundSeparator = true
+                    inQuote = false
+                    continue
+                }
+            }
+
+            // Separator line
+            if (line.trim() == "---") {
+                foundSeparator = true
+                inQuote = false
+                continue
+            }
+
+            // Signature lines
+            if (line.trimStart().startsWith("-- ")) {
+                signatures.add(line.trimStart().removePrefix("-- "))
+                continue
+            }
+
+            // Skip quote processing after we established there are no quotes
+            if (inQuote && quoteLines.isEmpty() && line.isBlank()) {
+                continue
+            }
+
+            inQuote = false
+
+            // Body paragraphs
+            if (line.isBlank()) {
+                if (currentParagraph.isNotEmpty()) {
+                    paragraphs.add(currentParagraph.toString().trim())
+                    currentParagraph = StringBuilder()
+                }
+            } else {
+                if (currentParagraph.isNotEmpty()) {
+                    currentParagraph.append(" ")
+                }
+                currentParagraph.append(line.trim())
+            }
+        }
+
+        // Flush remaining paragraph
+        if (currentParagraph.isNotEmpty()) {
+            paragraphs.add(currentParagraph.toString().trim())
+        }
+
+        val quote = if (quoteLines.isNotEmpty()) quoteLines.joinToString(" ") else null
+
+        return Foreword(
+            quote = quote,
+            paragraphs = paragraphs,
+            signatures = signatures
+        )
+    }
+
+    fun parseFile(file: File): Foreword = parse(file.readText())
+}

parser/src/main/kotlin/de/pfadfinder/songbook/parser/Validator.kt

@@ -1,7 +1,9 @@
 package de.pfadfinder.songbook.parser
 
 import de.pfadfinder.songbook.model.BookConfig
+import de.pfadfinder.songbook.model.FontSpec
 import de.pfadfinder.songbook.model.Song
+import java.io.File
 
 data class ValidationError(val file: String?, val line: Int?, val message: String)
 
@@ -50,6 +52,27 @@ object Validator {
             if (outer <= 0) errors.add(ValidationError(file = null, line = null, message = "Outer margin must be greater than 0"))
         }
 
+        // Validate font files exist (paths should already be resolved to absolute by the pipeline)
+        validateFontFile(config.fonts.lyrics, "lyrics", errors)
+        validateFontFile(config.fonts.chords, "chords", errors)
+        validateFontFile(config.fonts.title, "title", errors)
+        validateFontFile(config.fonts.metadata, "metadata", errors)
+        validateFontFile(config.fonts.toc, "toc", errors)
+
         return errors
     }
+
+    private fun validateFontFile(font: FontSpec, fontRole: String, errors: MutableList<ValidationError>) {
+        val fontFile = font.file ?: return
+        val file = File(fontFile)
+        if (!file.exists()) {
+            errors.add(
+                ValidationError(
+                    file = null,
+                    line = null,
+                    message = "Font file for '$fontRole' not found: $fontFile"
+                )
+            )
+        }
+    }
 }

parser/src/test/kotlin/de/pfadfinder/songbook/parser/ChordProParserTest.kt

@@ -485,4 +485,147 @@ class ChordProParserTest {
         line.segments[2].chord shouldBe "G"
         line.segments[2].text shouldBe "End"
     }
+
+    @Test
+    fun `parse notes block with multiple paragraphs`() {
+        val input = """
+            {title: Song}
+            {start_of_notes}
+            First paragraph of the notes.
+            It continues on the next line.
+
+            Second paragraph with different content.
+            {end_of_notes}
+            {start_of_verse}
+            text
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.notes shouldHaveSize 2
+        song.notes[0] shouldBe "First paragraph of the notes. It continues on the next line."
+        song.notes[1] shouldBe "Second paragraph with different content."
+    }
+
+    @Test
+    fun `parse notes block with single paragraph`() {
+        val input = """
+            {title: Song}
+            {start_of_notes}
+            A single note paragraph.
+            {end_of_notes}
+            {start_of_verse}
+            text
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.notes shouldHaveSize 1
+        song.notes[0] shouldBe "A single note paragraph."
+    }
+
+    @Test
+    fun `parse notes block with short directives son eon`() {
+        val input = """
+            {title: Song}
+            {son}
+            Short form notes.
+            {eon}
+            {start_of_verse}
+            text
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.notes shouldHaveSize 1
+        song.notes[0] shouldBe "Short form notes."
+    }
+
+    @Test
+    fun `notes block and single note directives combine`() {
+        val input = """
+            {title: Song}
+            {note: Single line note}
+            {start_of_notes}
+            Block note paragraph.
+            {end_of_notes}
+            {start_of_verse}
+            text
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.notes shouldHaveSize 2
+        song.notes[0] shouldBe "Single line note"
+        song.notes[1] shouldBe "Block note paragraph."
+    }
+
+    @Test
+    fun `parse notes block with three paragraphs`() {
+        val input = """
+            {title: Song}
+            {start_of_notes}
+            Paragraph one.
+
+            Paragraph two.
+
+            Paragraph three.
+            {end_of_notes}
+            {start_of_verse}
+            text
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.notes shouldHaveSize 3
+        song.notes[0] shouldBe "Paragraph one."
+        song.notes[1] shouldBe "Paragraph two."
+        song.notes[2] shouldBe "Paragraph three."
+    }
+
+    @Test
+    fun `parse image directive within song section`() {
+        val input = """
+            {title: Song}
+            {start_of_verse}
+            [Am]Hello world
+            {image: images/drawing.png}
+            [C]Goodbye world
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.sections shouldHaveSize 1
+        song.sections[0].lines shouldHaveSize 3
+        song.sections[0].lines[0].segments[0].chord shouldBe "Am"
+        song.sections[0].lines[1].imagePath shouldBe "images/drawing.png"
+        song.sections[0].lines[1].segments.shouldBeEmpty()
+        song.sections[0].lines[2].segments[0].chord shouldBe "C"
+    }
+
+    @Test
+    fun `parse image directive outside section creates implicit verse`() {
+        val input = """
+            {title: Song}
+            {image: images/landscape.jpg}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.sections shouldHaveSize 1
+        song.sections[0].type shouldBe SectionType.VERSE
+        song.sections[0].lines shouldHaveSize 1
+        song.sections[0].lines[0].imagePath shouldBe "images/landscape.jpg"
+    }
+
+    @Test
+    fun `parse multiple image directives`() {
+        val input = """
+            {title: Song}
+            {start_of_verse}
+            {image: img1.png}
+            Some text
+            {image: img2.png}
+            {end_of_verse}
+        """.trimIndent()
+        val song = ChordProParser.parse(input)
+        song.sections[0].lines shouldHaveSize 3
+        song.sections[0].lines[0].imagePath shouldBe "img1.png"
+        song.sections[0].lines[0].segments.shouldBeEmpty()
+        song.sections[0].lines[1].imagePath.shouldBeNull()
+        song.sections[0].lines[1].segments[0].text shouldBe "Some text"
+        song.sections[0].lines[2].imagePath shouldBe "img2.png"
+    }
 }

parser/src/test/kotlin/de/pfadfinder/songbook/parser/ConfigParserTest.kt

@@ -1,6 +1,8 @@
 package de.pfadfinder.songbook.parser
 
 import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.nulls.shouldBeNull
+import io.kotest.matchers.nulls.shouldNotBeNull
 import io.kotest.matchers.shouldBe
 import kotlin.test.Test
 
@@ -167,6 +169,76 @@ class ConfigParserTest {
         config.layout.verseSpacing shouldBe 6f
     }
 
+    @Test
+    fun `parse config with foreword section`() {
+        val yaml = """
+            book:
+              title: "Test"
+            foreword:
+              file: "./vorwort.txt"
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.foreword.shouldNotBeNull()
+        config.foreword!!.file shouldBe "./vorwort.txt"
+    }
+
+    @Test
+    fun `parse config without foreword section has null foreword`() {
+        val yaml = """
+            book:
+              title: "Test"
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.foreword.shouldBeNull()
+    }
+
+    @Test
+    fun `parse config with toc highlight column`() {
+        val yaml = """
+            book:
+              title: "Test"
+            toc:
+              highlight_column: "CL"
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.toc.highlightColumn shouldBe "CL"
+    }
+
+    @Test
+    fun `parse config without toc section uses defaults`() {
+        val yaml = """
+            book:
+              title: "Test"
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.toc.highlightColumn.shouldBeNull()
+    }
+
+    @Test
+    fun `parse config with german metadata labels`() {
+        val yaml = """
+            book:
+              title: "Test"
+            layout:
+              metadata_labels: german
+              metadata_position: bottom
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.layout.metadataLabels shouldBe "german"
+        config.layout.metadataPosition shouldBe "bottom"
+    }
+
+    @Test
+    fun `parse config with default metadata settings`() {
+        val yaml = """
+            book:
+              title: "Test"
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.layout.metadataLabels shouldBe "abbreviated"
+        config.layout.metadataPosition shouldBe "top"
+    }
+
     @Test
     fun `parse config ignores unknown properties`() {
         val yaml = """
@@ -179,4 +251,21 @@ class ConfigParserTest {
         val config = ConfigParser.parse(yaml)
         config.book.title shouldBe "Test"
     }
+
+    @Test
+    fun `parse config with custom title font file only`() {
+        val yaml = """
+            book:
+              title: "Fraktur Test"
+            fonts:
+              title: { file: "./fonts/Fraktur.ttf", size: 16 }
+        """.trimIndent()
+        val config = ConfigParser.parse(yaml)
+        config.fonts.title.file shouldBe "./fonts/Fraktur.ttf"
+        config.fonts.title.size shouldBe 16f
+        config.fonts.title.family shouldBe "Helvetica"  // default family as fallback
+        // Other fonts should still use defaults
+        config.fonts.lyrics.file.shouldBeNull()
+        config.fonts.lyrics.family shouldBe "Helvetica"
+    }
 }

parser/src/test/kotlin/de/pfadfinder/songbook/parser/ForewordParserTest.kt

@@ -0,0 +1,150 @@
+package de.pfadfinder.songbook.parser
+
+import io.kotest.matchers.collections.shouldBeEmpty
+import io.kotest.matchers.collections.shouldHaveSize
+import io.kotest.matchers.nulls.shouldBeNull
+import io.kotest.matchers.nulls.shouldNotBeNull
+import io.kotest.matchers.shouldBe
+import kotlin.test.Test
+
+class ForewordParserTest {
+
+    @Test
+    fun `parse foreword with quote, paragraphs and signatures`() {
+        val input = """
+            > This is a quote line one
+            > and quote line two
+            ---
+            This is the first paragraph of the foreword body.
+            It continues on the next line.
+
+            This is the second paragraph.
+
+            -- Max Mustermann
+            -- Erika Mustermann
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.quote.shouldNotBeNull()
+        foreword.quote shouldBe "This is a quote line one and quote line two"
+        foreword.paragraphs shouldHaveSize 2
+        foreword.paragraphs[0] shouldBe "This is the first paragraph of the foreword body. It continues on the next line."
+        foreword.paragraphs[1] shouldBe "This is the second paragraph."
+        foreword.signatures shouldHaveSize 2
+        foreword.signatures[0] shouldBe "Max Mustermann"
+        foreword.signatures[1] shouldBe "Erika Mustermann"
+    }
+
+    @Test
+    fun `parse foreword without quote`() {
+        val input = """
+            This is just a paragraph.
+
+            And another one.
+
+            -- Author Name
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.quote.shouldBeNull()
+        foreword.paragraphs shouldHaveSize 2
+        foreword.paragraphs[0] shouldBe "This is just a paragraph."
+        foreword.paragraphs[1] shouldBe "And another one."
+        foreword.signatures shouldHaveSize 1
+        foreword.signatures[0] shouldBe "Author Name"
+    }
+
+    @Test
+    fun `parse foreword without signatures`() {
+        val input = """
+            > A beautiful quote
+            ---
+            The foreword body text goes here.
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.quote shouldBe "A beautiful quote"
+        foreword.paragraphs shouldHaveSize 1
+        foreword.paragraphs[0] shouldBe "The foreword body text goes here."
+        foreword.signatures.shouldBeEmpty()
+    }
+
+    @Test
+    fun `parse empty foreword`() {
+        val foreword = ForewordParser.parse("")
+
+        foreword.quote.shouldBeNull()
+        foreword.paragraphs.shouldBeEmpty()
+        foreword.signatures.shouldBeEmpty()
+    }
+
+    @Test
+    fun `parse foreword with only paragraphs`() {
+        val input = """
+            First paragraph.
+
+            Second paragraph.
+
+            Third paragraph.
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.quote.shouldBeNull()
+        foreword.paragraphs shouldHaveSize 3
+        foreword.paragraphs[0] shouldBe "First paragraph."
+        foreword.paragraphs[1] shouldBe "Second paragraph."
+        foreword.paragraphs[2] shouldBe "Third paragraph."
+        foreword.signatures.shouldBeEmpty()
+    }
+
+    @Test
+    fun `parse foreword with multi-line paragraph`() {
+        val input = """
+            This is a long paragraph that
+            spans multiple lines and should
+            be joined into a single paragraph.
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.paragraphs shouldHaveSize 1
+        foreword.paragraphs[0] shouldBe "This is a long paragraph that spans multiple lines and should be joined into a single paragraph."
+    }
+
+    @Test
+    fun `parse foreword with only a quote`() {
+        val input = """
+            > Just a quote
+            ---
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.quote shouldBe "Just a quote"
+        foreword.paragraphs.shouldBeEmpty()
+        foreword.signatures.shouldBeEmpty()
+    }
+
+    @Test
+    fun `parse foreword with multiple signatures`() {
+        val input = """
+            Some text here.
+
+            -- Person One
+            -- Person Two
+            -- Person Three
+        """.trimIndent()
+
+        val foreword = ForewordParser.parse(input)
+
+        foreword.paragraphs shouldHaveSize 1
+        foreword.signatures shouldHaveSize 3
+        foreword.signatures[0] shouldBe "Person One"
+        foreword.signatures[1] shouldBe "Person Two"
+        foreword.signatures[2] shouldBe "Person Three"
+    }
+}

parser/src/test/kotlin/de/pfadfinder/songbook/parser/ValidatorTest.kt

@@ -206,4 +206,53 @@ class ValidatorTest {
         errors shouldHaveSize 1
         errors[0].file shouldContain "myfile.chopro"
     }
+
+    @Test
+    fun `missing font file produces validation error`() {
+        val config = BookConfig(
+            fonts = FontsConfig(
+                title = FontSpec(file = "/nonexistent/path/FrakturFont.ttf", size = 14f)
+            )
+        )
+        val errors = Validator.validateConfig(config)
+        errors shouldHaveSize 1
+        errors[0].message shouldContain "title"
+        errors[0].message shouldContain "not found"
+    }
+
+    @Test
+    fun `multiple missing font files produce multiple errors`() {
+        val config = BookConfig(
+            fonts = FontsConfig(
+                title = FontSpec(file = "/nonexistent/title.ttf", size = 14f),
+                lyrics = FontSpec(file = "/nonexistent/lyrics.ttf", size = 10f)
+            )
+        )
+        val errors = Validator.validateConfig(config)
+        errors shouldHaveSize 2
+    }
+
+    @Test
+    fun `config with no font files produces no font errors`() {
+        val config = BookConfig()  // all default built-in fonts
+        val errors = Validator.validateConfig(config)
+        errors.shouldBeEmpty()
+    }
+
+    @Test
+    fun `config with existing font file produces no error`() {
+        // Create a temporary file to simulate an existing font file
+        val tempFile = kotlin.io.path.createTempFile(suffix = ".ttf").toFile()
+        try {
+            val config = BookConfig(
+                fonts = FontsConfig(
+                    title = FontSpec(file = tempFile.absolutePath, size = 14f)
+                )
+            )
+            val errors = Validator.validateConfig(config)
+            errors.shouldBeEmpty()
+        } finally {
+            tempFile.delete()
+        }
+    }
 }

renderer-pdf/src/main/kotlin/de/pfadfinder/songbook/renderer/pdf/PdfBookRenderer.kt

@@ -74,6 +74,14 @@ class PdfBookRenderer : BookRenderer {
                     cb.beginText()
                     cb.endText()
                 }
+                is PageContent.ForewordPage -> {
+                    val leftMargin = if (isRightPage) marginInner else marginOuter
+                    renderForewordPage(
+                        cb, fontMetrics, config,
+                        pageContent.foreword, pageContent.pageIndex,
+                        contentTop, leftMargin, contentWidth
+                    )
+                }
             }
 
             pageDecorator.addPageNumber(cb, currentPageNum, pageSize.width, pageSize.height)
@@ -96,6 +104,8 @@ class PdfBookRenderer : BookRenderer {
     ) {
         var y = contentTop
 
+        val renderMetaAtBottom = config.layout.metadataPosition == "bottom"
+
         if (pageIndex == 0) {
             // Render title
             val titleFont = fontMetrics.getBaseFont(config.fonts.title)
@@ -108,20 +118,22 @@ class PdfBookRenderer : BookRenderer {
             cb.endText()
             y -= titleSize * 1.5f
 
-            // Render metadata line (composer/lyricist)
-            val metaParts = mutableListOf<String>()
-            song.composer?.let { metaParts.add("M: $it") }
-            song.lyricist?.let { metaParts.add("T: $it") }
-            if (metaParts.isNotEmpty()) {
-                val metaFont = fontMetrics.getBaseFont(config.fonts.metadata)
-                val metaSize = config.fonts.metadata.size
-                cb.beginText()
-                cb.setFontAndSize(metaFont, metaSize)
-                cb.setColorFill(Color.GRAY)
-                cb.setTextMatrix(leftMargin, y - metaSize)
-                cb.showText(metaParts.joinToString(" / "))
-                cb.endText()
-                y -= metaSize * 1.8f
+            // Render metadata line (composer/lyricist) - at top position only
+            if (!renderMetaAtBottom) {
+                val metaParts = buildMetadataLines(song, config)
+                if (metaParts.isNotEmpty()) {
+                    val metaFont = fontMetrics.getBaseFont(config.fonts.metadata)
+                    val metaSize = config.fonts.metadata.size
+                    for (metaLine in metaParts) {
+                        cb.beginText()
+                        cb.setFontAndSize(metaFont, metaSize)
+                        cb.setColorFill(Color.GRAY)
+                        cb.setTextMatrix(leftMargin, y - metaSize)
+                        cb.showText(metaLine)
+                        cb.endText()
+                        y -= metaSize * 1.8f
+                    }
+                }
             }
 
             // Render key and capo
@@ -197,8 +209,14 @@ class PdfBookRenderer : BookRenderer {
 
             // Render lines
             for (line in section.lines) {
-                val height = chordLyricRenderer.renderLine(cb, line, leftMargin, y, contentWidth)
-                y -= height + 1f  // 1pt gap between lines
+                val imgPath = line.imagePath
+                if (imgPath != null) {
+                    // Render inline image
+                    y -= renderInlineImage(cb, imgPath, leftMargin, y, contentWidth)
+                } else {
+                    val height = chordLyricRenderer.renderLine(cb, line, leftMargin, y, contentWidth)
+                    y -= height + 1f  // 1pt gap between lines
+                }
             }
 
             // End repeat marker
@@ -218,19 +236,50 @@ class PdfBookRenderer : BookRenderer {
             y -= config.layout.verseSpacing / 0.3528f
         }
 
-        // Render notes at the bottom
+        // Render notes at the bottom (with word-wrap for multi-paragraph notes)
         if (pageIndex == 0 && song.notes.isNotEmpty()) {
             y -= 4f
             val metaFont = fontMetrics.getBaseFont(config.fonts.metadata)
             val metaSize = config.fonts.metadata.size
-            for (note in song.notes) {
-                cb.beginText()
-                cb.setFontAndSize(metaFont, metaSize)
-                cb.setColorFill(Color.GRAY)
-                cb.setTextMatrix(leftMargin, y - metaSize)
-                cb.showText(note)
-                cb.endText()
-                y -= metaSize * 1.5f
+            val noteLineHeight = metaSize * 1.5f
+
+            for ((idx, note) in song.notes.withIndex()) {
+                val wrappedLines = wrapText(note, metaFont, metaSize, contentWidth)
+                for (wrappedLine in wrappedLines) {
+                    cb.beginText()
+                    cb.setFontAndSize(metaFont, metaSize)
+                    cb.setColorFill(Color.GRAY)
+                    cb.setTextMatrix(leftMargin, y - metaSize)
+                    cb.showText(wrappedLine)
+                    cb.endText()
+                    y -= noteLineHeight
+                }
+                // Add paragraph spacing between note paragraphs
+                if (idx < song.notes.size - 1) {
+                    y -= noteLineHeight * 0.3f
+                }
+            }
+        }
+
+        // Render metadata at bottom of song page (if configured)
+        if (renderMetaAtBottom && pageIndex == 0) {
+            val metaParts = buildMetadataLines(song, config)
+            if (metaParts.isNotEmpty()) {
+                y -= 4f
+                val metaFont = fontMetrics.getBaseFont(config.fonts.metadata)
+                val metaSize = config.fonts.metadata.size
+                for (metaLine in metaParts) {
+                    val wrappedLines = wrapText(metaLine, metaFont, metaSize, contentWidth)
+                    for (wrappedLine in wrappedLines) {
+                        cb.beginText()
+                        cb.setFontAndSize(metaFont, metaSize)
+                        cb.setColorFill(Color.GRAY)
+                        cb.setTextMatrix(leftMargin, y - metaSize)
+                        cb.showText(wrappedLine)
+                        cb.endText()
+                        y -= metaSize * 1.5f
+                    }
+                }
             }
         }
 
@@ -247,6 +296,35 @@ class PdfBookRenderer : BookRenderer {
         }
     }
 
+    /**
+     * Build metadata lines based on configured label style.
+     * Returns a list of lines to render (may be empty).
+     */
+    private fun buildMetadataLines(song: Song, config: BookConfig): List<String> {
+        val useGerman = config.layout.metadataLabels == "german"
+        val lines = mutableListOf<String>()
+
+        if (useGerman) {
+            // German labels: "Worte und Weise:" when same person, otherwise separate
+            if (song.lyricist != null && song.composer != null && song.lyricist == song.composer) {
+                lines.add("Worte und Weise: ${song.lyricist}")
+            } else {
+                song.lyricist?.let { lines.add("Worte: $it") }
+                song.composer?.let { lines.add("Weise: $it") }
+            }
+        } else {
+            // Abbreviated labels on a single line
+            val parts = mutableListOf<String>()
+            song.composer?.let { parts.add("M: $it") }
+            song.lyricist?.let { parts.add("T: $it") }
+            if (parts.isNotEmpty()) {
+                lines.add(parts.joinToString(" / "))
+            }
+        }
+
+        return lines
+    }
+
     /**
      * Renders reference book abbreviations and page numbers as a footer row
      * at the bottom of the song page, above the page number.
@@ -316,6 +394,150 @@ class PdfBookRenderer : BookRenderer {
         cb.stroke()
     }
 
+    private fun renderForewordPage(
+        cb: PdfContentByte,
+        fontMetrics: PdfFontMetrics,
+        config: BookConfig,
+        foreword: Foreword,
+        pageIndex: Int,
+        contentTop: Float,
+        leftMargin: Float,
+        contentWidth: Float
+    ) {
+        var y = contentTop
+        val bodyFontSpec = config.fonts.lyrics
+        val bodyFont = fontMetrics.getBaseFont(bodyFontSpec)
+        val bodySize = bodyFontSpec.size
+        val lineHeight = bodySize * 1.5f
+
+        if (pageIndex == 0) {
+            // Page 1: Quote + separator + first paragraphs
+
+            // Render quote in italic (bold)
+            val quoteText = foreword.quote
+            if (quoteText != null) {
+                val quoteFont = fontMetrics.getBaseFontBold(bodyFontSpec)
+                val quoteSize = bodySize * 1.1f
+
+                // Word-wrap the quote text
+                val quoteLines = wrapText(quoteText, quoteFont, quoteSize, contentWidth)
+                for (quoteLine in quoteLines) {
+                    cb.beginText()
+                    cb.setFontAndSize(quoteFont, quoteSize)
+                    cb.setColorFill(Color.DARK_GRAY)
+                    cb.setTextMatrix(leftMargin, y - quoteSize)
+                    cb.showText(quoteLine)
+                    cb.endText()
+                    y -= quoteSize * 1.5f
+                }
+
+                y -= 6f  // gap before separator
+
+                // Horizontal rule
+                cb.setLineWidth(0.5f)
+                cb.setColorStroke(Color.GRAY)
+                cb.moveTo(leftMargin, y)
+                cb.lineTo(leftMargin + contentWidth, y)
+                cb.stroke()
+                y -= 10f  // gap after separator
+            }
+
+            // Render body paragraphs
+            for (paragraph in foreword.paragraphs) {
+                val wrappedLines = wrapText(paragraph, bodyFont, bodySize, contentWidth)
+                for (wrappedLine in wrappedLines) {
+                    cb.beginText()
+                    cb.setFontAndSize(bodyFont, bodySize)
+                    cb.setColorFill(Color.BLACK)
+                    cb.setTextMatrix(leftMargin, y - bodySize)
+                    cb.showText(wrappedLine)
+                    cb.endText()
+                    y -= lineHeight
+                }
+                y -= lineHeight * 0.5f  // paragraph spacing
+            }
+
+            // Render signatures (right-aligned)
+            if (foreword.signatures.isNotEmpty()) {
+                y -= lineHeight  // extra gap before signatures
+                val metaFont = fontMetrics.getBaseFont(config.fonts.metadata)
+                val metaSize = config.fonts.metadata.size
+                for (signature in foreword.signatures) {
+                    val sigWidth = metaFont.getWidthPoint(signature, metaSize)
+                    cb.beginText()
+                    cb.setFontAndSize(metaFont, metaSize)
+                    cb.setColorFill(Color.DARK_GRAY)
+                    cb.setTextMatrix(leftMargin + contentWidth - sigWidth, y - metaSize)
+                    cb.showText(signature)
+                    cb.endText()
+                    y -= metaSize * 1.8f
+                }
+            }
+        } else {
+            // Page 2: blank (or overflow content if needed in the future)
+            cb.beginText()
+            cb.endText()
+        }
+    }
+
+    /**
+     * Simple word-wrap: splits text into lines that fit within maxWidth (in points).
+     */
+    private fun wrapText(text: String, font: BaseFont, fontSize: Float, maxWidth: Float): List<String> {
+        val words = text.split(" ")
+        val lines = mutableListOf<String>()
+        var currentLine = StringBuilder()
+
+        for (word in words) {
+            val testLine = if (currentLine.isEmpty()) word else "$currentLine $word"
+            val testWidth = font.getWidthPoint(testLine, fontSize)
+            if (testWidth <= maxWidth) {
+                currentLine = StringBuilder(testLine)
+            } else {
+                if (currentLine.isNotEmpty()) {
+                    lines.add(currentLine.toString())
+                }
+                currentLine = StringBuilder(word)
+            }
+        }
+        if (currentLine.isNotEmpty()) {
+            lines.add(currentLine.toString())
+        }
+
+        return lines
+    }
+
+    /**
+     * Renders an inline image within a song page at the given position.
+     * Returns the total height consumed in PDF points.
+     */
+    private fun renderInlineImage(
+        cb: PdfContentByte,
+        imagePath: String,
+        leftMargin: Float,
+        y: Float,
+        contentWidth: Float
+    ): Float {
+        try {
+            val img = Image.getInstance(imagePath)
+            // Scale to fit within content width, max height 40mm (~113 points)
+            val maxHeight = 40f / 0.3528f  // 40mm in points
+            img.scaleToFit(contentWidth * 0.8f, maxHeight)
+
+            // Center horizontally
+            val imgX = leftMargin + (contentWidth - img.scaledWidth) / 2
+            val imgY = y - img.scaledHeight - 3f  // 3pt gap above
+
+            img.setAbsolutePosition(imgX, imgY)
+            cb.addImage(img)
+
+            return img.scaledHeight + 6f  // image height + gaps above/below
+        } catch (_: Exception) {
+            // If image can't be loaded, consume minimal space
+            return 5f
+        }
+    }
+
     private fun renderFillerImage(document: Document, imagePath: String, pageSize: Rectangle) {
         try {
             val img = Image.getInstance(imagePath)

renderer-pdf/src/main/kotlin/de/pfadfinder/songbook/renderer/pdf/PdfFontMetrics.kt

@@ -3,15 +3,21 @@ package de.pfadfinder.songbook.renderer.pdf
 import com.lowagie.text.pdf.BaseFont
 import de.pfadfinder.songbook.model.FontMetrics
 import de.pfadfinder.songbook.model.FontSpec
+import java.io.File
 
 class PdfFontMetrics : FontMetrics {
     private val fontCache = mutableMapOf<String, BaseFont>()
 
     fun getBaseFont(font: FontSpec): BaseFont {
-        val key = font.file ?: font.family
+        val fontFile = font.file
+        val key = if (fontFile != null) File(fontFile).canonicalPath else font.family
         return fontCache.getOrPut(key) {
-            if (font.file != null) {
-                BaseFont.createFont(font.file, BaseFont.IDENTITY_H, BaseFont.EMBEDDED)
+            if (fontFile != null) {
+                val file = File(fontFile)
+                if (!file.exists()) {
+                    throw IllegalArgumentException("Font file not found: ${file.absolutePath}")
+                }
+                BaseFont.createFont(file.absolutePath, BaseFont.IDENTITY_H, BaseFont.EMBEDDED)
             } else {
                 // Map common family names to built-in PDF fonts
                 val pdfFontName = when (font.family.lowercase()) {

renderer-pdf/src/main/kotlin/de/pfadfinder/songbook/renderer/pdf/TocRenderer.kt

@@ -3,11 +3,15 @@ package de.pfadfinder.songbook.renderer.pdf
 import com.lowagie.text.*
 import com.lowagie.text.pdf.*
 import de.pfadfinder.songbook.model.*
+import java.awt.Color
 
 class TocRenderer(
     private val fontMetrics: PdfFontMetrics,
     private val config: BookConfig
 ) {
+    // Light gray background for the highlighted column
+    private val highlightColor = Color(220, 220, 220)
+
     fun render(document: Document, writer: PdfWriter, tocEntries: List<TocEntry>) {
         val tocFont = fontMetrics.getBaseFont(config.fonts.toc)
         val tocBoldFont = fontMetrics.getBaseFontBold(config.fonts.toc)
@@ -35,12 +39,25 @@ class TocRenderer(
         }
         table.setWidths(widths)
 
+        // Determine which column index should be highlighted
+        val highlightAbbrev = config.toc.highlightColumn
+        val highlightColumnIndex: Int? = if (highlightAbbrev != null) {
+            // Check "Seite" (page) column first - the current book's page number column
+            if (highlightAbbrev == "Seite") {
+                1
+            } else {
+                val refIndex = refBooks.indexOfFirst { it.abbreviation == highlightAbbrev }
+                if (refIndex >= 0) 2 + refIndex else null
+            }
+        } else null
+
         // Header row
         val headerFont = Font(tocBoldFont, fontSize, Font.BOLD)
-        table.addCell(headerCell("Titel", headerFont))
-        table.addCell(headerCell("Seite", headerFont))
-        for (book in refBooks) {
-            table.addCell(headerCell(book.abbreviation, headerFont))
+        table.addCell(headerCell("Titel", headerFont, isHighlighted = false))
+        table.addCell(headerCell("Seite", headerFont, isHighlighted = highlightColumnIndex == 1))
+        for ((i, book) in refBooks.withIndex()) {
+            val isHighlighted = highlightColumnIndex == 2 + i
+            table.addCell(headerCell(book.abbreviation, headerFont, isHighlighted = isHighlighted))
         }
         table.headerRows = 1
 
@@ -49,31 +66,43 @@ class TocRenderer(
         val aliasFont = Font(tocFont, fontSize, Font.ITALIC)
         for (entry in tocEntries.sortedBy { it.title.lowercase() }) {
             val font = if (entry.isAlias) aliasFont else entryFont
-            table.addCell(entryCell(entry.title, font))
-            table.addCell(entryCell(entry.pageNumber.toString(), entryFont, Element.ALIGN_RIGHT))
-            for (book in refBooks) {
+            table.addCell(entryCell(entry.title, font, isHighlighted = false))
+            table.addCell(entryCell(entry.pageNumber.toString(), entryFont, Element.ALIGN_RIGHT, isHighlighted = highlightColumnIndex == 1))
+            for ((i, book) in refBooks.withIndex()) {
                 val ref = entry.references[book.abbreviation]
-                table.addCell(entryCell(ref?.toString() ?: "", entryFont, Element.ALIGN_RIGHT))
+                val isHighlighted = highlightColumnIndex == 2 + i
+                table.addCell(entryCell(ref?.toString() ?: "", entryFont, Element.ALIGN_RIGHT, isHighlighted = isHighlighted))
             }
         }
 
         document.add(table)
     }
 
-    private fun headerCell(text: String, font: Font): PdfPCell {
+    private fun headerCell(text: String, font: Font, isHighlighted: Boolean): PdfPCell {
         val cell = PdfPCell(Phrase(text, font))
         cell.borderWidth = 0f
         cell.borderWidthBottom = 0.5f
         cell.paddingBottom = 4f
+        if (isHighlighted) {
+            cell.backgroundColor = highlightColor
+        }
         return cell
     }
 
-    private fun entryCell(text: String, font: Font, alignment: Int = Element.ALIGN_LEFT): PdfPCell {
+    private fun entryCell(
+        text: String,
+        font: Font,
+        alignment: Int = Element.ALIGN_LEFT,
+        isHighlighted: Boolean = false
+    ): PdfPCell {
         val cell = PdfPCell(Phrase(text, font))
         cell.borderWidth = 0f
         cell.horizontalAlignment = alignment
         cell.paddingTop = 1f
         cell.paddingBottom = 1f
+        if (isHighlighted) {
+            cell.backgroundColor = highlightColor
+        }
         return cell
     }
 }

renderer-pdf/src/test/kotlin/de/pfadfinder/songbook/renderer/pdf/PdfFontMetricsTest.kt

@@ -6,6 +6,7 @@ import io.kotest.matchers.floats.shouldBeLessThan
 import io.kotest.matchers.shouldBe
 import io.kotest.matchers.types.shouldBeSameInstanceAs
 import kotlin.test.Test
+import kotlin.test.assertFailsWith
 
 class PdfFontMetricsTest {
 
@@ -158,4 +159,73 @@ class PdfFontMetricsTest {
         height shouldBeGreaterThan 3f
         height shouldBeLessThan 6f
     }
+
+    // --- Custom font file tests ---
+
+    private val testFontPath: String
+        get() = this::class.java.getResource("/TestFont.ttf")!!.file
+
+    @Test
+    fun `getBaseFont loads custom font from file path`() {
+        val font = FontSpec(file = testFontPath, size = 12f)
+        val baseFont = metrics.getBaseFont(font)
+        // Custom font should load successfully and have a non-null PostScript name
+        baseFont.postscriptFontName.isNotEmpty() shouldBe true
+    }
+
+    @Test
+    fun `getBaseFont caches custom font by canonical path`() {
+        val font1 = FontSpec(file = testFontPath, size = 12f)
+        val font2 = FontSpec(file = testFontPath, size = 14f)  // different size, same file
+        val first = metrics.getBaseFont(font1)
+        val second = metrics.getBaseFont(font2)
+        first shouldBeSameInstanceAs second
+    }
+
+    @Test
+    fun `getBaseFont throws for missing font file`() {
+        val font = FontSpec(file = "/nonexistent/path/MissingFont.ttf", size = 12f)
+        assertFailsWith<IllegalArgumentException> {
+            metrics.getBaseFont(font)
+        }
+    }
+
+    @Test
+    fun `getBaseFontBold returns same font when file is specified`() {
+        val font = FontSpec(file = testFontPath, size = 12f)
+        val regular = metrics.getBaseFont(font)
+        val bold = metrics.getBaseFontBold(font)
+        // Custom fonts don't have auto-resolved bold variants
+        regular shouldBeSameInstanceAs bold
+    }
+
+    @Test
+    fun `measureTextWidth works with custom font file`() {
+        val font = FontSpec(file = testFontPath, size = 12f)
+        val width = metrics.measureTextWidth("Hello World", font, 12f)
+        width shouldBeGreaterThan 0f
+    }
+
+    @Test
+    fun `measureTextWidth handles German umlauts with custom font`() {
+        val font = FontSpec(file = testFontPath, size = 12f)
+        // These should not throw and should return positive widths
+        val umlautWidth = metrics.measureTextWidth("\u00e4\u00f6\u00fc\u00df", font, 12f)
+        umlautWidth shouldBeGreaterThan 0f
+
+        // Full German words with umlauts
+        val wordWidth = metrics.measureTextWidth("Gr\u00fc\u00dfe aus \u00d6sterreich", font, 12f)
+        wordWidth shouldBeGreaterThan 0f
+    }
+
+    @Test
+    fun `measureTextWidth with custom font returns different width than built-in font`() {
+        val customFont = FontSpec(file = testFontPath, size = 10f)
+        val builtInFont = FontSpec(family = "Courier", size = 10f)  // use Courier for contrast
+        val customWidth = metrics.measureTextWidth("Test text", customFont, 10f)
+        val builtInWidth = metrics.measureTextWidth("Test text", builtInFont, 10f)
+        // They should both be positive but likely different
+        customWidth shouldBeGreaterThan 0f
+        builtInWidth shouldBeGreaterThan 0f
+    }
 }

songbook.yaml

@@ -14,6 +14,11 @@ fonts:
   title:     { family: "Helvetica", size: 14 }
   metadata:  { family: "Helvetica", size: 8 }
   toc:       { family: "Helvetica", size: 9 }
+  # To use a custom font file (e.g. Fraktur/Blackletter for titles):
+  # title:   { file: "./fonts/FrakturFont.ttf", size: 16 }
+  # The file path is relative to the project directory.
+  # Supported formats: .ttf, .otf
+  # Custom fonts are embedded in the PDF and support Unicode (including umlauts).
 
 layout:
   margins: { top: 15, bottom: 15, inner: 20, outer: 12 }