Why cant I highlight text in my pdf files?

It says the tool for highlighting text is for files where document rights are enabled. How do I enable document rights? I hope there is not some kind of legal bull crap stopping me from highlighting a damn line of text. I hate it when software companies screw things up like this. If there is a way for me to highlight the text please tell me. I am writing a big paper and it is annoying that those retarded programers couldn't just let me highlight it.Why cant I highlight text in my pdf files?
How to change the security of a PDF file?





If the source PDF file has been protected with an ';User Password'; only, you can try to change the security of PDF file with Foxonic Standard/Professional Edition:





3 steps to change password/permissions of PDF files:


(1) Set building mode to ';All to One'; and set destination PDF file name, location.





(2) Click ';PDF Security';, you can set new ';User Password';, ';Owner Password'; and ';Permissions'; for the PDF files.





(3) Select source PDF file and click ';Build'; button, then the new password and permissions will be added to the PDF files automatically.Why cant I highlight text in my pdf files?
hit F1 and search for it or Google ';enable document rights';
pdf files can be locked yes, it depends how they are made, it is the file, not the program

regal theater