When I open the PDF file, there is not ability to get to "Tools" on one system but when I go to another system I can see it. But in neither case can I see the "Protect" option to password protectr the file. Probably very simple but I can't make it happen. Easy answer for someone but not me. Please assist.
For each of the two systems please let us know the software you are actually running. Please go to Help > About and tell us if you have Acrobat Pro, Acrobat Standard, Acrobat Reader or Adobe Reader - or something else. Also the exact version shown in the About box, like 11.0.34 or 2015.1243.90022
I have Acrobat Reader DC.
You need Adobe Acrobat (not Adobe Acrobat Reader) to be able to do that.