(Lilypond version 2.24.1, Guile 2.2).
What is the easiest way to put a big number (e.g. font size 4 bold)
in the upper left or right corner of a score? In previous versions I
used to manage this with a double header, one in \book and one in
\score, and faking a second "poet" (left corner) or "composer" (right
corner), but this does not seem to work any more, at least not the way
it used to. Moreover it isn't a very "clean" solution. Something like a regular (but huge) page number would be better.