+ "Wordwrap the data which has been assigned to @var{symbol}.
+
+@lilypond[verbatim,quote]
+\\header {
+ title = \"My title\"
+ descr = \"Lorem ipsum dolor sit amet, consectetur adipisicing elit,
+ sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
+ Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris
+ nisi ut aliquip ex ea commodo consequat.\"
+}
+
+\\paper {
+ bookTitleMarkup = \\markup {
+ \\column {
+ \\fill-line { \\fromproperty #'header:title }
+ \\null
+ \\wordwrap-field #'header:descr
+ }
+ }
+}
+
+\\markup {
+ \\null
+}
+@end lilypond"