Hi Steve, In an include file, I have the following:
showMMRs = {
\set Staff.keepAliveInterfaces =
#'( rhythmic-grob-interface
multi-measure-rest-interface
lyric-interface
stanza-number-interface
percent-repeat-interface) }
letStaffVanish = \set Staff.keepAliveInterfaces = #'()
showLyrics = \set Lyrics.keepAliveInterfaces = #'(lyric-interface
text-interface)
letLyricsVanish = \set Lyrics.keepAliveInterfaces = #'()
I use those to turn staves and lyrics on/off.
Hope that helps!
Kieren.
