Thanks so much for publishing your site. I am an amateur photographer trying to grow out of my amateur title a little bit and find your articles amazingly helpful. I am trying to print some contact sheets for some free work I did (to boost my portfolio of course). I have no problem using Apertures contact sheet printing but I am trying to figure out if there is any way to have Aperture include my watermark on every single image. The only thing I've come up with on my own is to export every image with the watermark setting and then import them and then use the contact sheet print setting. That seems like an awful lot of work. Do you know of a better way? Thanks in advance for any help you are able to provide.

There is a better way, but it needs a reasonable amount of set-up. It involves using Automator to add a watermark to the contact print PDFs created by Aperture. I have written an article describing how to do this.