If you have a Word document that is over one page long , you can easily reduce the document to fit on one page in your Print options.
-- With your document Open, select File
-- Click Print from the resulting menu
-- Find the Zoom section in the Print window
-- If your document is 6 pages, then in the Pages per sheet: drop down menu, select 6 pages
-- Click OK
Once you click OK, your document will now automatically be formatted to fit into one page. Keep in mind that the more text there is in this document, the smaller the font size will be.