Jimbo, Not sure what you mean by M\S\R but when I go as far to the right as possible, I just see more blank bars. All the way to the left is the key signature and the options for Lyrics, Chords, Expressions, etc. and I do not see how to close those options.
Sorry if i am being thick-headed here.
EDIT:
OK, found this on an earlier thread I started:
Try this and let me know if it works for you (or not). On the right hand side of the staff view is a smaller viewer pane containing a listing of the tracks currently displayed in your staff view. It allows you to mute and solo etc. Grab the left hand border and drag it completely to the right until you can't see it's content anymore (in effect hiding that mini viewer pane). Save your project as is before doing anything else. Now switch views (screensets) at will and if I'm right about this, you should not have anymore of those "white screen crash".
I do not see such a pane in my view. Thanks.