I use this: http://multivalent.sourceforge.net/
See section Tools: Encrypt Regards, Keto On Wednesday 03 November 2004 13:32, Tuukka Toivonen wrote: > I'm writing some lab exercise instructions for students. > Since there are many of them, I haven't put the instructions > online as PDF to save printers and paper. But I know PDF has a feature to > disable printing, and if I could use that feature from LyX/pdflatex, it > would be great. > > Is it possible to set a flag in PDF files using LyX/pdflatex or > something else on Linux, that disallows printing in most programs? > > I know this is easy to work around, but the intention is not to > stop students completely from printing the file, but just encourage that. > > I'm using Debian Sarge.
