Re: Getting Y-offset on systems to be exact on left and right "mirrored pages"

[Thomas Morley]

Am Do., 5. Aug. 2021 um 20:29 Uhr schrieb Jean Abou Samra <jean@abou-samra.fr>:
>
>
>
> Le 05/08/2021 à 12:39, Owain Evans a écrit :
> > That is totally fantastic! Works perfectly!
> > I've one variable / context defining both left and right pages: system 
> > in-between distance and bars per system.
> > And will just add another context if I need to use the Y-offset of 
> > NonMusicalPaperColumn which will be unlikely.
> >
> > Many thanks,
> > Owain
>
>
> Um, why don't I see the systems lining up then?
> (Output attached.)
>
> \version "2.22.1"
>
> #(set-global-staff-size 40) % for visibility
>
> \paper {
>    top-system-spacing =
>    #'((basic-distance . 10)
>       (minimum-distance . 10)
>       (padding . 0)
>       (stretchability .0))
> }
>
> mymusic = { \repeat unfold 16 {c4} \break }
>
> \bookpart {
> \relative c' {
>   \overrideProperty Score.NonMusicalPaperColumn.
>   line-break-system-details  #'((Y-offset . 40))
>      \mymusic }
> }
>
> \bookpart {
> \relative c''' {
>     \overrideProperty Score.NonMusicalPaperColumn.
>     line-break-system-details #'((Y-offset . 40))
>   \ottava #1
>   \mymusic }
>    }
>
>
> Regards,
> Jean

Because the manual use of
\overrideProperty
Score.NonMusicalPaperColumn.line-break-system-details  #'((Y-offset .
40))
overrides the paper-setting.

Cheers,
  Harm