Okular does not allow review on PDF


I sometimes use Okular to annotate a PDF using highlighting, drawing boxes, underlining or writing notes. This feature is called review in Okular. However, I noticed that this review feature is disabled on certain PDF files. I did check the filesystem and the file was not readonly.


Turns out that when a PDF has DRM options set in it, Okular obeys those limitations by default. Thankfully, this can be turned off easily. Go to Settings → Configure Okular → General and uncheck the Obey DRM limitations option. You will need to restart Okular after you apply this. You will now be able to review the PDF.

Tried with: Okular 0.24.2 and Ubuntu 16.04


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