Hi, I have one more question on this topic:
How can I check whether a header field is present at all? (Or my main goal: how can I avoid that the code fails?) This works: \version "2.19.50" \header { title = "ABC" } \paper { oddFooterMarkup = #(module-ref $defaultheader 'title) } { a } This does not for obvious reasons: oddFooterMarkup = #(module-ref $defaultheader 'maintainer) Instead of putting all possible headers in a default header like maintainer = ##f I would like to check the presence, sth like this pseudocode: oddFooterMarkup = #(if (in? 'maintainer $defaultheader) (module-ref $defaultheader 'maintainer) "") Cheers, Joram _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user