Steve Litt wrote:
On Sunday 04 March 2007 22:36, Myriam Abramson wrote:
Hello,
Some pdfs can be modified and saved with the modifications using
acroread I believe. How can you produce such pdfs with LyX?
I would like to make an exam with empty boxes for the students to fill
out. Is it possible?
TIA
Use pdftk. There was an extensive discussion on it, on this list, about a year
ago IIRC. Otherwise, just google for pdftk.
It's a bit more complicated than that, I think. There's header
information in the file that sets permissions, including annotation.
AFAIK some non-Adobe readers pay attention to those headers and some
don't. Acrobat Reader, however, requires both the permissions setting
and a digital signature, and it seems that only Acrobat Pro can supply
the signature. So something like pdftk can set the permissions to allow
non-Adobe readers to annotate the file, but I don't know how to make it
work in AR other by using Acrobat Pro.
Disclaimer: That was the state of things about a year ago (around the
time of the thread Steve recalls). It's possible things have changed
since, but I haven't heard anything about a change.
/Paul
