The PDF specification provides many options for the display of textual content and the related extraction of the text content. In this article I will try to highlight the key areas and terms that you will encounter when working under the hood with fonts in PDF files. Key terms that you should take note of are in bold.
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.