Viewing several document at once
Either:
from the Window menu, choose Arrange Views. This places all the document views so you can see them all at once.
or from the Window menu, choose Cascade. This places all the document views in a diagonal line so you can see all their title bars.
or drag the title bars of the document views and resize them so you can see the ares you need to.
Tip
If you have a document open, but don't need to see it, minimize it to an icon. If you use Arrange Views now, the minimized document stays at the bottom of the screen.