The Forel manuals are a pain to use. I've been using pdf/computer based manuals for more than 10 years now and by far Forel is the worst to deal with in terms of DRM. On a Mac as long as the document in Reader is open the screen grab facility is disabled. I've got the print version of the FSM (1st edition bought way back when...) and I'd go nuts if I had to use the Forel DRM on the FSM or assembly manuals. I'd avoid the Forel products unless you absolutely need them.