Hello,
I downloaded publications from scientific journals such as Nature or Cell, but however I saved them or emailed them, the buttons for markup tools remained unavailable, i.e. stayed grey in the toolbar.
For comparison, PDF files created from Word by conversion works fine for markup, commenting, sticky notes, etc. On the other hand, these same saved files were open for markup when I was using Adobe 8 Pro (now displaced from computer). So the problem is specific to 9 Pro and files downloaded from scientific journal online publications.
I tried to go through all buttons to find things like "rights", "security", "edit enabling" etc, but got nowhere. I think a similar question was posted by someone else earlier and the help just said "have you tried to enable commenting?" or something like that. I guess my question is not what to try, but which sequence of buttons to click.
Many thanks in advance.
Lori Kassuba is an AUC Expert and Community Manager for AcrobatUsers.com.