PDF Watermarks descriptions Simply add a watermark to all of your PDF files with one mouse click! This will mark you files as your copyrighted property. You can add the watermark behind all objects or print it over existings texts. You can number the pages of existing PDF files or add you company logo or your Copyright message. You can process as much files as you want with one mouse click. Only if the file is protect with a password you have to enter the password before the program can continue to batch process the PDF files.