Re: Centering markup between staves

[Simon Albrecht]

On 25.09.2015 14:29, Robert Clausecker wrote:
> > Here’s a really nice version which uses the Stanza_number_engraver
> > (normally used in Lyrics contexts) to place the clavier indication
> > before the moment for which it applies. Besides, this fortunately
> > ensures perfect alignment with the dynamic following.
> > Also, the \general-align markup command helped simplify the code.
> >
> > %%%%%%%%%%%%%%%
> > \version "2.19.27"
> > regR = \markup \general-align #Y #0 {
> >     \normal-text { R }
> >     \override #'(font-encoding . fetaBraces) \lookup #"brace60"
> > }
> >
> > \score {
> >     \new PianoStaff <<
> >       \new Staff \relative c' {
> >         c4 d e f |
> >         g a b c |
> >       }
> >       \new Dynamics \with {
> >         \override DynamicText.self-alignment-Y = 0
> >         %\override TextScript.self-alignment-Y = 0
> >         \consists Stanza_number_engraver
> >       } {
> >         \set stanza = \regR s1\p
> >       }
> >       \new Staff \relative c {
> >         c4 d e f |
> >         g a b c |
> >       }
> >     >>
> > }
> > %%%%%%%%%%%%%
> > I hope this also work in more complicated situations.
> This looks nice, but unfortunately I don't think it's going to help in
> my situation. These marks denote register changes in an organ score
> and appear quite often (about every 20 bars or so).

Of course.

>   Each such mark
> needs to be perfectly centered between the staves.

Perfect centering is currently difficult – see 
<http://sourceforge.net/p/testlilyissues/issues/1127/>. You’re likely 
going to need to tweak Y-offset or even extra-offset.

>   I believe a Stanza
> number can only be placed at the beginning of the score (with one
> stanza number per stanza), but I might be mistaken here.

\set stanza can be used at any time in the score, so no problem there.

Yours, Simon