Reply to: watermark in PDF outputSeptember 20, 2010 at 11:37 pm
I believe you can set up Acrobat Distiller to automatically add a watermark to PDF files. When creating a PDF in XMetaL, use the “XMetaL Enhanced PDF via RenderX XEP and Acrobat Distiller” option, and whatever settings you've configured for Acrobat Distiller should be picked up.
If you want to go the route of modifying the DITA Open Toolkit, the dita-users group on Yahoo! has a thread which might be helpful: http://tech.groups.yahoo.com/group/dita-users/message/16373 .