As Gary mentioned, Adobe Photoshop has a filter for placing and reading watermarks. The version that I have uses the Digimark system. When you use this service, you register your facility with Digimarc and subscribe to this service. As long as you pay, you are maintained in their database and anyone who reads a watermark embedded in an image can contact Digimarc and they will provide your copyright information to them. http://www.digimarc.com/sterms.html I can't see how any of this would prevent someone from taking your images, as this particular watermark is designed to not be visible, your only indication of it's presence is if you have a program which can read the imbedded watermark and then indicate that the image is copyrighted. Mark C. Vang Freya Ventures 2100 Mediterranean Ave. Suite 15 Virginia Beach, VA 23451 (757) 340-0099