In some places, I have a \markup-style mark over the same barline, and
at the same barline, I also want a rehearsal mark (produced by \mark
\default). Unfortunately it seems only one \mark is allowed at any given
moment.
This is a type of markup-style marking I mean:
\mark \markup { \fontsize #-2 { \note #"4." #1 "=" \note #"2" #1 } }
... where you wouldn't want the score to print the duration equivalence
over every staff, just at the top. And of course rehearsal marks
shouldn't go over every staff either.
Is there any workaround?