Hmmm...it's hard to tell exactly what you are asking or what the problem is.
You set margins from "Page Setup" under the "Margins" tab. Make your
settings changes there and click on OK to "update the document". If you set
the margins outside the printer area, you will get a warning asking to fix
or ignore...take your pick there.
Maybe you could post back and actually ask a question and provide more
detail.
Tim