Is it possible the dividng line is simply all the way to one side (or top or bottom) and needs to be dragged to the center? That would happen if the display resolution or window size has changed since the last time this was used.
In any case, MuseScore 3 will receive no further updates, and MuseScore 4 uses separate windows instead of split view, so the issue wiill soon be moot.
Comments
Is it possible the dividng line is simply all the way to one side (or top or bottom) and needs to be dragged to the center? That would happen if the display resolution or window size has changed since the last time this was used.
In any case, MuseScore 3 will receive no further updates, and MuseScore 4 uses separate windows instead of split view, so the issue wiill soon be moot.