Change the size of the "white page" provided by DraftSight?

OBO Mary Marra - Please help!!  My upgrade went well.  No problems with fonts or setting changing.. but... the page size is WAY off.  It's so hard to work with this and it won't plot.

How do I change the size of the "white page" provided by DraftSight?  I'm self-taught and DraftSight is great.  I'm sure this is an easy fix for someone with a lot of experience, but this has never happened to me before.