I have created a document in Microsoft Word and set the
page width at 5" and length at 7".  I would like to print
the document on a 8 1/2" x 11" sheet of paper and have it
centered on the paper.  But when I print the document it
is always aligned at the top.  I tried accessing the page
layout tab and changing the vertical alignment to
centered, but it still prints at the top of the page.  
When I accessed Microsoft Help it indicated that Microsoft
Word always aligns partial pages at the top of a page, so
I'm assuming that Word thinks my document is a partial
page.  

My document is over 50 pages of 5" x 7" text.  I tried
reconfiguring the margins as if my document was originally
8 1/2" x 11", but my page count shifted because words
began to wrap onto different pages.  Would anyone be able
to tell me how I can center my text without reconfiguring
my margins?  Is there a way to tell word that I would like
to center my document which is considered a partial page?  
Any assistance would be greatly appreciated.  I am working
on a deadline.  Thank you very much.