There is a quick way to change the page size of all of your parts in one edit operation within Finale. Here’s how:
Choose Page Size… from the Page Layout menu:
Select your new page size:
Finally, choose Change: All Parts from the pop-up menu:
Don’t forget to change the printer Page Setup… size to match this new size when you print.
That’s all there is to it.
~robert
Related : Sibelius : Change the page size of all of your parts in one edit