To stamp any quantity of already existing documents (they must be able to be fed through your printer -- usually all 8 1/2 x 11 or 14" -- smaller sizes in Microsoft Word), begin at a blank screen.  Invoke StampIt.  Select the stamp you wish to use. Increment the number of copies of the stamp to equal the number of documents you want to stamp.  Chose StampIt.  The rest is automatic.  NOTE:   Be sure to check which side of the paper your printer prints on if using the paper tray to ensure that your documents are stamped on the intended side of the paper.