How to Change the Security Settings on a PDF File
The official application utilized to create, edit and secure Portable Document Format (PDF) documents is Adobe Acrobat. PDF documents may be secured with password restrictions on editing and printing the document or a password may be required to even open the document. To change security settings if the file is already password protected, the user must have the full access password for the PDF document as well as the Adobe Acrobat application. If the document does not have security configured, the user may set the security by applying password restrictions using Adobe Acrobat.
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Instructions
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Right-click on the PDF file and select "Open With....".Adobe Acrobat will appear as an option.
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Select "Adobe Acrobat."
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Enter the password, if needed, and click "OK."
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Click the "File" option from the top navigation bar, and then select "Document Properties."
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Click the "Security" tab, if it is not already selected.
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From the "Security Method" menu, select "Password Security." The Password Security interface will appear.
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Check the checkbox labeled "Require a password to open the document" if you want to require a password to open the document. Enter the password in the input field and click "OK."
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Confirm the password in the confirmation input box and click "OK."
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Check the check box labeled "Restricted editing and printing of this document" if you wish to do so. An Edit box and a Print box will appear with "None" selected for both. None indicates security is not set to restrict editing and printing.
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Configure editing and printing restrictions and enter the password. Click "OK."
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Confirm the password and click "OK."
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Click "OK" to the verification prompt.
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Click "OK" to close the "Document properties" window. Security settings have now been changed for the document.
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