Anteil der songinfo Breite an Gesamtbreite konfigurierbar

default_style.ly

@@ -1,6 +1,7 @@
 songFormatAndSize = "a5"
 songMargin = 5
 songInfoFontSize = 0
+songInfoLineWidthFraction = 0.9
 songTitleFont = "LilyPond Sans"
 songChordFont = "LilyPond Sans"
 songLyricFont = "LilyPond Sans"

footer_with_songinfo.ly

@@ -200,7 +200,7 @@
 #(define-markup-command (fractional-line-width layout props arg)(markup?)
   (interpret-markup layout props
     (make-override-markup
-      `(line-width . ,(* (chain-assoc-get 'header:songinfo-size-factor props 0.9) (ly:output-def-lookup layout 'line-width)))
+      `(line-width . ,(* (chain-assoc-get 'header:songinfo-size-factor props songInfoLineWidthFraction) (ly:output-def-lookup layout 'line-width)))
       arg)))
 
 \paper {