GSview is a graphical interface for Ghostscript, an interpreter for the PostScript language and Portable Document Format. GSview allows selected pages to be viewed, printed, or converted to bitmap, PostScript or PDF formats.
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.