Staff size scaling baseline
When enabling “Size follows ‘Staff space’ setting”, what is the scaling relative to? That is, which Spatium (in mm or imperialistic units) corresponds to a 12 pt text being set in exactly twelve PostScript points (1/72th inch)?
The other three programs seem to document this (see https://www.scoringnotes.com/tips/spaces-and-the-units-of-measurement-f… for the article which pointed this out to me), but for MuseScore I can’t find it either with a site search, in the handbook or in the code really (only magic numbers like
SPATIUM20 with no documentation whatsoever). This ought to be in the user handbook.