Issue Moving Fretboard Diagram to custom pallet
According to the manual I should be able to move my custom edited fretboard diagram in my score to my custom pallet using Shift+Ctrl to drag and drop into the pallet. The program does not allow this action and changes the mouse to a red slashed circle when the mouse gets hovered above the custom pallet even when editing is allowed.
Comments
The problem has been reported on Github:
"Difficult to copy element to palette; maybe a problem with Ctrl+Shift selection"
https://github.com/musescore/MuseScore/issues/17823
[EDIT]
A wild guess... Are your custom fretboard diagrams larger than the standard fretboard diagrams already on the palette?