Re: Lyric line's vertical position is shifting from one staff system to the next.

[dfro]

A P.S. to my beginner musings:

Perhaps, the VerticalAxisGroup stretchability variable could be adjusted 
in its behavior, so that when it is at 0, no bounding box/skyline 
safeguards are considered for the nonstaff-relatedstaff-spacing property 
at all - the 'text baseline to staff center' relationship would be rigid 
with no stretching/shifting for any reason. If someone wants to use 
negative padding numbers to vertically place a lyric line up into a 
staff so that it clashes with objects, and also sets stretchability to 
0, then so be it. (That could also apply to any of the other spacing 
properties: nonstaff-nonstaff, nonstaff-unrelatedstaff, etc.) I think 
that would make my situation work, if the developers deem it worthy of 
consideration. To my beginner observations, stretchability = 0 does not 
mean no stretchability, at the moment.

This is assuming I am not missing or misunderstanding something that is 
described in the extensive documentation. (Today, I found documentation 
on how to contribute to the documentation. LilyPond is an amazing project!)

Peace,
David