Hi Diane,
You can add page numbers by going to the Tools pane, Pages panel, under Edit Page Design select "Header and Footer" then in the pulldown select Add Header or Footer. In the dialog for that you can click the button ( middle of dialog) Insert Page Number and fill that out as you want it. You'll also want to click on the Page Number and Date Format link ( left side middle of that dialog) to set up the page numbering option there.
Hope this helps,
Dimitri
WindJack Solutions
www.windjack.com
www.pdfscripting.com