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I have been using Okular (1.3.3) on Ubuntu (18.04) for a while now and feel pretty confident in my ability to be productive in it. However, suddenly, I am lost.

I opened a PDF (as I have done 100s of times) and pressed F6 to get the annotations toolbar. Nothing happened. I checked for stuck keys on my keyboard. Nothing changed. I closed the PDF and opened another PDF and everything works as expected. I went back and opened the troublesome PDF.

Under the Tools menu, Review (F6) is grayed out (disabled). I checked the file to see if it was read-only. It was not.

Any ideas why the annotation toolbar would not be available in some PDF but would in others? Any idea how to fix it?

3 Answers 3

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Try turning off the Obey DRM, in Settings -> Configure Okular

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  • 1
    Hi and welcome. If you could edit and expand upon your answer, if possible, explaining why your solution would help, then that would be great. As it stands, your answer is a little brief. Aug 22, 2020 at 16:46
  • I had the same issue, and this fix resolved it for me.
    – MRule
    Feb 28, 2022 at 17:39
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Possibly this PDF (your troublesome.pdf) is just readable not editable. You can change it by this command:

$ qpdf -decrypt just_readable.pdf editable.pdf

Then F6 will work.

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Since the other pdf file works fine — It seems Okular does not recognize the troubled file as a legitimate pdf. You might want (if not already done) to create a new pdf file & see what happens.

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    This seems like more of a comment than an answer 🤔
    – user1091774
    Jan 7, 2021 at 3:33

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