Scrolling in the editorwindow can be somewhat annoying, because one is able to scroll vertically in the column that is reserved for eventually existing and visible pianorolls:
An alternating behaviour of a stationary mousepointer while scrolling with the mousewheel is very counterintuitive and is IMHO without precedence. This way it just doesn’t make sense to me, sorry. So please restrict the ability to scroll to the then rermaining areas.