A really cool tool to help you skim PDFs comes in the form of SKIM, a PDF reader and note-taker designed for OS X users. Originally targeted at helping all those brainy university students annotate scientific papers in PDF, this tool is also becoming ubiquitous among users who want to view, export or bookmark PDF files.
The tool is open source and has an engaging Wiki with tons of good information for how to use SKIM, including the cool tips and advanced tricks.
SKIM gives users the power to modify the colors of notes and highlights within a PDF file as well as customize default colors for new notes and highlights. The program also features a toolbar with drag and drop functionality.
Additionally, users can crop pages for easier display and use different crop sizes for even and odd pages. SKIM also enables exporting notes as text from PDF files and bookmarking features as well.
The program offers support for Apple Remote Control.A free fully functional version of the program can be downloaded at the developer's Web site.
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.