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I have PDF file I scanned. I am unable to change the security setting to add password it it.

Here is link how to password protect it and also the screenshot for the gray'ed out security propety.

I have already tried. File Save As PDF and it still didn't work.

Guide To add password.

enter image description here

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    use save as and create a new copy.
    – Ramhound
    Oct 30, 2014 at 15:20
  • I have already done that, it didn't work.
    – Mowgli
    Oct 30, 2014 at 15:26
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    If you tried that. You should mention that you tried it in the question itself. Because my initial thought was that the method you used to create the .PDF was limited in some capacity.
    – Ramhound
    Oct 30, 2014 at 15:29
  • I am sorry, I will do that.
    – Mowgli
    Oct 30, 2014 at 15:30
  • A very stupid question: are you in Acrobat or in Reader (XI)?
    – Max Wyss
    Oct 31, 2014 at 5:57

2 Answers 2

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Print it to another PDF. Open that PDF and then add the security you want.

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  • I don't see option to print to PDF.
    – Mowgli
    Oct 30, 2014 at 15:33
  • Depending on the Windows version, Linux version, etc. You can also install some "pdf printer" (google it and you'll find a lot of softwares that are installed and act like a printer, so you'll be able to print to PDF). Oct 30, 2014 at 15:35
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If you are really in Acrobat (see comment above), check the settings for PDF/A viewing mode. You find that in the Documents tab of the Preferences: View Documents in PDF/A mode, and set it to Never. As you say they are scanned, it is possible that the scan software creates (or pretends to create) PDF/A documents.

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