This Acrobat Plug-In allows a user to select fonts, sizes, attributes, and/or strings to be used to create Bookmarks in a PDF document. The Bookworm searches through a document and when a match is found it creates a bookmark to the location of the Match in the document.
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.