Add scrollbars. And allow keeping them displayed
Sibelius has these cool bars on the bottom and right hand side of the score that allow the user to pan the score around really fast to see different parts (see screenshot). I can't see them anywhere in the View menu in Musescore.
It would be great if Musescore could add them too. Quite a few apps on Windows use them and it makes navigation really fast compared to clicking and dragging with the mouse multiple times.
I see Musescore does have a "navigator" bar. Three problems though:
1) the little white page blocks above it take up unnecessary space
2) it doesn't allow you to scroll vertically with any accuracy
3) it doesn't stay open by default either per score or globally as a setting