Adding comments
I would like a feature that allowed one to add a comment, sort of like the "Sticky" feature in Adobe Acrobat, or the comments in MS Word. I frequently want to make a "note to self" on some element that I need to come back to at a later date. A comment feature would be very helpful.
Here is a comment from Acrobat. You can move it around to any position on the file.
Comments
Not exactly what you were asking for, but have a look at https://musescore.org/en/project/add-comments-score