To password protect an OpenOffice document, first, open the document that you want to protect.
Next, click on “File” in the top left corner of the screen.
Then, select “Save As.” In the “Save As” window, click on the drop-down menu next to “Format.”
Select “ODF Encrypted Document.” Enter a password in the “Password” and “Confirm Password” fields.
Finally, click on the “Save” button.