This is an artefact of some poorer PDF viewers; your example shows perfectly in Acrobat. Sadly, I see the effect often in Frescobaldi (on Windows) when not zoomed in, but have got used to it - zooming in always shows that the postscript is correct.
Paul From: John F. Gibson <johnfgib...@gmail.com> To: <bug-lilypond@gnu.org> Sent: 07/12/2023 22:57 Subject: subtitle moves notes off staff lines I've noticed at times lilypond produces notes that are not exactly on or between the staff lines. I boiled it down to the attached minimum example, which shows a D flat that looks floated up about half way to E flat. However, if you comment out the header subtitle, the note lands precisely on D flat. Thank you so much for this beautiful music editor! I am enjoying using it very much. It sure beats dragging, dropping, and flipping through menus. John -- John F. Gibson 17 Oyster River Rd Durham NH 03824