I work for a very large agency, and slugging every document takes time. As does tracking printouts, and who worked on a file last. This plug in addresses all our needs. I asked for a couple of modifications, and two days later the 3.1.2 update was posted. It now tracks fonts and images (optionally,) used in the slug area as well as those on the page. I can't ask for better response, and this price makes it a no brainer.