Restrict changes to powerpoint presentations if you don't want content reviewers to accidentally change your powerpoint presentation, you can use formatting and editing restrictions The people you share the presentation with receive an email invitation to view it. Here’s how you can do it
Select “info” from the sidebar Ad an optional message, and select send Introduction have you ever opened a powerpoint presentation and accidentally made changes you didn’t intend to save
In powerpoint for the web, select share in the upper right corner, and share again Type the names or email addresses of the people to share the presentation with Select can edit and change it to can view