Re: Temporarily override frenched score

[Lukas-Fabian Moser]

Hi,

> No, I was applying it to the 2nd system. If I put the command 
> \showMultiRests before the first bar of any system, it seems to have 
> no effect, but it works fine when I put it before any other bar on the 
> staff. As I rarely have just 1 bar on a staff this should not be a 
> problem in practice.

The reason seem to be that setting keepAliveInterfaces at a line-break 
point affects both systems that participate.

For example:

%%%%
\version "2.20.0"
\language "english"

\layout {
  \context {
    \Staff
    \RemoveAllEmptyStaves
  }
}

%% => http://lsr.di.unimi.it/LSR/Item?id=312
showMultiRests = {
 \set Staff.keepAliveInterfaces = #'(
    rhythmic-grob-interface
    multi-measure-rest-interface
    lyric-interface
    stanza-number-interface
    percent-repeat-interface)
}
hideMultiRests = \unset Staff.keepAliveInterfaces

fillBar = \relative c' { g'8[ g g g g g] | }
fillLine = { \fillBar \fillBar \fillBar \fillBar }

partA = {
  \key d \major \time 6/8 \clef "G"
  R2.*4 \break
  R2.*4 \break
  \showMultiRests R2.*4 \break \hideMultiRests % Affects 3 systems
  R2.*4 \break
  R2.*4 \break
  R2.*4 \break
  R2.*4 \break
  R2. \showMultiRests R2.*2 \hideMultiRests R2. \break % Affects only 1 
system
  R2.*4 \break
}

partB = {
  \key d \major \time 6/8 \clef "G"
  \repeat unfold 9 \fillLine
}

\score {
  <<
  \new Staff \with { shortInstrumentName = "Pt A" } \partA
  \new Staff \with { shortInstrumentName = "Pt B" } \partB
  >>
}
%%%%

I do not know if there is an elegant way to change this behaviour.

Best
Lukas