Preview (El Capitan): Password-protect a PDF
Password-protect a PDF in Preview
You can give a PDF a password that everyone must enter to open the file. The password is used to encrypt the file.
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Open the PDF you want to password-protect.
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Choose File > Export, then select Encrypt.
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Type a password, then retype it to verify the password.
Zuletzt geändert: Sep 30, 2015