When launched, PowerPoint 365 for Mac typically opens with Backstage View. If you want to create a new presentation, you can do so using the New tab. If you want to work on any of the already created presentations, you can open them by using the various options in the Open tab. Unlike in Windows versions of PowerPoint, PowerPoint 365 for Mac has no Close tab.
Learn about file opening and closing options within Backstage view in PowerPoint 365 for Mac.

