You can configure security settings on these PDFs in Adobe Acrobat, before or after distribution, to keep them safe from unauthorized access. Open the PDF in question and click Tools |. Look at the Acrobat's File menu: if you can Save a copy, then the document is Reader enabled: Save a copy to disabled it. I had the same issue with a form that was created by someone else . Jan 11,  · Follow these steps to update PDF security settings: Open your PDF in Adobe Acrobat DC. Navigate to the “File” men