The Backstage view in PowerPoint for the Web provides access to the File menu and some other options. However, don’t expect the Backstage view within PowerPoint for the Web to be as full featured, compared to the Backstage view in PowerPoint’s desktop versions—in fact, there’s almost no feature to control interface elements. The options here mainly accomplish basic tasks such as sharing, saving, downloading, etc.
Explore Backstage view in PowerPoint for the Web.

