PDF Hacks
While I prefer to use single page .TIF files in discovery, there are those who prefer the PDF format. Therefore, it is important to know both how to use them to advantage in litigation and also how to modify them.
There is a website called PDFHacks which maintains a list of software and strategies when handling PDFs. This includes, but is certainly not limited to things such as modifying metadata so that the files are searchable for, e.g. Bates numbers.