This is a minimal frontend to a somewhat functional online viewer, with which you can currently view word documents as html and postscript and pdf files as gif images. Given a url on the net or a file on your computer, the viewer will try to retrieve it and convert it to one gif image per page.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.