57Gregy
"Being able to see big chunks of the score at once"
On your second monitor with the Staff view, open the Print Preview. That will allow you to see the entire score, or any selected tracks and be able to change pages.
Of course, you won't be able to edit the print preview, but anything you do in the Staff view or PRV, or record into a track will be reflected in the PP.
Or, I'm misunderstanding what you mean, a problem I have that has been pointed out by many women. 
A much better solution is to use tabs and have as many notation editor views as you need. For example, the piece I'm currently working on has 7 tabs: winds, brass, percussion, synths, orchestral strings. chamber strings and mixed (mixed is whatever instruments I need to see at that moment).
To quickly move from screen to screen, just select the tab you need and all the instruments for that group are there, ready for editing and/or input. The instruments within the tab are memorized, so are the staff sizes, which might be different for each tabbed view.
Jerry
www.jerrygerber.com