A recommended approach to secure your most private documents — whether it’s a PDF, Word file, or Excel spreadsheet — is to lock them with a passcode. While this does help keep sensitive ...

A recommended approach to secure your most private documents — whether it's a PDF, Word file, or Excel spreadsheet — is to lock them with a passcode.

Learn how to fix You can’t make this change because the selection is locked error which you may see while editing a Word document.