PowerPoint 2016 allows you to customize the Ribbon in a number of ways. You can add Ribbon tabs, add Groups, and populate these with 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!
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