Lets Go to this link to check out the Advanced Options we have to customize our APPLICATION ( not this current file, but the overall application settings on YOUR machine.) then ill show you how you can set and change these settings once we know about them.
Just paste this link into your Favorite Browser ( Chrome, Edge, Internet Explorer, FireFox, etc.)
https://support.office.com/en-us/article/powerpoint-options-advanced-bdbee278-4984-4c7d-88ad-6f493bd18343