On 2019-07-31 10:24 pm, Werner LEMBERG wrote:
Folks,
please have a look at the attached (non-MWE) example. If the
`padding' value in `system-system-spacing' is -2, both systems are
displayed on one page – and there is plenty of vertical space still
available at the bottom.
If I change `padding' to -1, I suddenly get two pages. Why? What
parameters am I missing to get the two systems on one page without
overlapping? In case there is no bug in lilypond this should be
easily possible, right?
I would suspect it is simply LilyPond's early estimation for page
breaking that is determining there would be insufficient room. In my
experience, LilyPond seems to be a little generous when estimating the
potential size of objects. This often results in music overflowing to
additional pages when not strictly needed. Adjusting variables like
system-count and systems-per-page are usually helpful.
You could experiment with setting page-breaking-system-system-spacing,
which can let you specify custom spacing variables that apply just for
the determination of page breaking. For instance, you will likely not
want a negative padding for the real system-system-spacing so that you
do not get any overlapping ink; but the negative padding could be needed
with page-breaking-system-system-spacing.
-- Aaron Hill
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