PowerPoint 365 for Windows allows you to customize the Ribbon in a number of ways. You can add new Ribbon tabs, add Groups within the Ribbon tabs, and populate these Groups with useful commands. And if you think you made a mess and were better off with the defaults, then you can always get back to square one. On a more positive front, you can share your customizations with friends and colleagues, or also your other computers. And you can export your customizations to a file saved as a backup for a rainy day!