Can't move notes across staves
I'm on Mac.
Command + Shift + Up or Down Arrow is supposed to move selected notes to the adjacent staff above or below.
This works when I create a new file from scratch. It doesn't work on files imported from musicxml. The notes never move away from the staff they are on.
Saving the file in musescore format and opening the .mscz file doesn't change anything, still doesn't work.
Any way to get it to work?