Combining marks

[Anthony W. Youngman]

I'm wanting to combine a rehearsal mark and an instruction, like say 
"(15) A little slower". The only snag is, you can't put multiple marks 
on a barline, and attaching the text to notes doesn't seem to be working 
for me.

I've found the LSR snippet that combines rehearsal and eg coda marks, 
but my knowledge of scheme isn't good enough to work out how to modify 
it. The snippet is below ...

#(define (format-mark-box-letters-dsegno mark context)
  (markup #:line
    (#:center-align
      (#:line (#:musicglyph "scripts.segno" #:hspace 0.5 #:musicglyph 
"scripts.segno")
        #:bold #:box (#:markletter (- (ly:context-property context 
'rehearsalMark) 2))
        ))))

markDefaultDSegno = {
  \set Score.markFormatter = #format-mark-box-letters-dsegno
  \once \override Score.RehearsalMark #'baseline-skip = #5
  \mark \default
}

Does the "mark context" match up to "\mark \default"? If I want to add 
random text after the mark, do I change it to "mark context text" and 
"\mark \default "A little slower" (along, of course, with altering the 
contents of the #define a bit?) I think I can see how to alter the 
(markup bit, but I'd like to know I'm on the right lines before I start 
messing about with something I don't understand :-)

Cheers,
Wol
--
Anthony W. Youngman - address@hidden