Lock down the strategy document to survive legal scrutiny — apply view-password protection limited to [approver=CEO] a…
Open the PDF file you want to restrict in Adobe Acrobat Pro.
Select File from the top menu, then choose Properties.
In the Document Properties window, click the Security tab.
From the Security Method dropdown, select Password Security.
In the Password Security Settings dialog, check the option to restrict editing and printing of the document.
Set a permissions password when prompted.
CautionIf you forget this password, you cannot change or remove the restrictions later.
Choose the specific restrictions you want to apply (e.g., disallow printing, disallow editing, disallow copying).
Click OK to confirm your settings and close the dialog.
Click OK again in the Document Properties window.
Save the PDF to apply the new permissions.
Best practiceTest your restricted PDF in a different PDF reader or with a different user account to confirm the permissions are enforced.
You can review or change these restrictions later by reopening the Document Properties and returning to the Security tab.
This runs in the Acrobat app - there is no separate API for this task.
'Printing Allowed: None' means no one can print the document at all. 'Low (150 dpi)' means people can print, but only at a low quality. This low quality is often not good enough for professional use, but might be okay for a quick draft. Choose 'None' for maximum security against printing.
Adobe Acrobat requires an owner password to ensure that only authorized people can change the security settings of a PDF. This password protects the restrictions you set, such as who can print or edit the document. Without it, anyone could simply remove the permissions you put in place, making the security useless.
If you forget the owner password, you will not be able to change the permissions or security settings of your PDF. Adobe Acrobat is designed to protect your document, so there is no easy way to recover a forgotten owner password. It's crucial to keep your password safe. If you have a backup of the original, unprotected document, you might need to use that. Otherwise, the restrictions will remain permanent.