> Rainer aus dem Spring wrote
>
> >Can anybody explain how the AI option works?
>
> Vertical spacing of multi-staff scores on a page is one of PMX's weaker
> areas. There is a complicated algorithm that computes a value for
> \interstaff, the space from the top of one staff to the top of the next
> staff in the same system. The number of systems on a page will have been
> set independently in one of a number of different ways. Then because the
> page ends with \eject but with no \vfill, the remaining vertical space is
> evenly distributed between the systems. The problem is that the algorithm
> for computing \interstaff doesn't always give the appearance you would
> like.
>
> Until I or someone else comes up with a better way of doing things, I
> implemented a kluge. "AI[x]", placed at the very beginning of a score,
> will multiply PMX's computed \interstaff for EVERY page by x. So for
> example if you want more space between systems on every page (compared to
> what PMX computed), then set x to something less than 1, thereby reducing
> the space between staves within each system and increasing the available
> vertical space for use between systems. And conversely. If you only want
> to make the adjustment on one page, use "Ai[x]" sometime BEFORE or right
> at the start of the new page.
>
> If there is only one staff per system, neither AI, Ai, nor \interstaff
> will have any effect, because \interstaff only applies between staves
> within a system. The way to control vertical spacing in this case is
> simply by changing the number of systems on the page, either in the setup
> data or with forced page breaks.
>
> Of course there are other ways of setting \interstaff and other vertical
> spacing parameters directly using in-line TeX; some of these have been
> discussed in the recent past on the list.
>
> --Don Simons
