CWC page occupies only the center portion of the screen

I am finally getting used to the operation of CWC and find it usable, but one thing bothers me. The page layout only fills the center one-third of the screen.

How do I make it spread out to full screen width?

I have a 64 bit Windows 7 OS

Computer with Intel Core i7 processor

CWC came with my copy of Corel Draw X6

Don