Mark Stephens has been working with PDF files since 1998 and is the lead developer on the JPedal Java PDF library. He is a speaker on PDF and Java at Javaone, Business of Software and other conferences. He admits to spending far too much time taking PDF files apart to see how they work.
PDF files are generally judged on how they appear. The problem is that a well-crafted PDF (basically, one that works) and a horrible PDF (one that doesn't) can look identical onscreen. Mark Stephens from IDRsolutions explains how to spot the difference and why it matters.
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.