Do you need to share your presentations with others? If yes, it’s a good idea to make sure that your presentations are set to be read-only before you share them. What you need then is the Mark as Final option in PowerPoint 2013, which makes your file read-only. Note that this option is not as restrictive as password protecting a PowerPoint presentation. The Mark as Final option tries to prevent users from typing, editing commands, and proofing — all editing options are disabled or turned off. However, do remember that Mark as Final is not a security feature and it can be easily reversed by the recipient of your file.