1. Click on the Home tab, then select Save PDF.
2. On the right hand side of the Save PDF window under the Security section you can select one or both of the check boxes. One will password protect opening the PDF file at all and the other will prevent any editing of the PDF. Check one or both of these check boxes according to your desired level of security and enter your password.
Note: Please make sure that it's a password you remember, these passwords are not something that our technical support staff will have access to.