If you sell PDF books, training materials, technical manuals, reports, or other protected documents, printing can create a problem. You may allow customers to print, but you may not want them to print unlimited copies. You may also want to
How to Track Who Opened Your Protected PDF Files with VeryPDF DRM Protector Statistics
If you sell eBooks, training materials, reports, or internal documents, one question comes up again and again: Which users opened my files? How many books did each user read? Which books are the most popular? How many times was a