I just downloaded Adobe Reader 10.3.1 and I just can't find the drawing markups tools under comments. When I open a page straight from the internet, it shows, but with any of my PDFs, it doesn't. I've tried all the menu options and have spent the last 2h reading FAQ, but just can't seem to figure out what to do to see these. I would greatly appreciate any help.
No, the replies you have received are correct. Only files specially prepared by someone with Acrobat Pro can be marked up in Reader. I think there is a good chance you have Acrobat at the office; it does look a lot like Reader until you look closely.
Reader can do markups, if someone with Acrobat has enabled them to be able to have markups. If they haven't been enabled or have security that restricts markups, Acrobat can do markups on a pdf file.