I have a problem related to the compatibility between .pdf files generated from LilyPond .ly files and the .pdf files used in a iPad/iPhone application PiaScore, which is used by some of the performers I work with.
When I import in the PiaScore iPad app a .pdf file generated from a LilyPond .ly source file, the engraving boxes appear in a blue color. I attached an image showing the problem.
pdf generated from ly source imported in PiaScore
To compile the .ly file to .pdf I have used the following: a) command-line, version: LilyPond 2.25.2
lilypond --pdf name.ly
b) Frescobaldi,
c) TeXShop.
The same result occurs with any of those.
Is there a way I can solve this problem? Is there a way to hide the color boxes?