LyX ⇒ pdflatex - pdf document rights

[hardya]

I have acrobat reader 9 and with the right document rights I should be able to allow people to highlight and postit etc etc my pdf files that I gen from lyx (latex).

But I am finding it hard to know where in lyx (dialog?) and what options to add for pdflatex to get an appropriately generated pdf file.

Any advice greatly appreciated.

Side question (not really latex) is it possible to do a dif on pdf files?

[josephwright]

pdfLaTeX can't do this directly. You'll need to make the PDF, open it in Acrobat, make it commentable and resave it.

[frabjous]

It should be mentioned that the "PDF document rights" are an Adobe-only extension to the PDF format, and Adobe has not made public the technology behind it. Hence, only Adobe software (well, really only Acrobat) has the capability to do that. On the other hand, only Adobe software (e.g., Adobe Reader) checks for it. Other PDF software which has commenting capabilities (like PDF X-Change Viewer) can add comments, etc., even if such rights hadn't been set in Acrobat.

I've never tried it, but there's a pdfdiff script here. I've never used. If I wanted to diff pdfs, I'd probably extract the text and diff that.