In various versions of PowerPoint, including PowerPoint 365 for Mac, what’s the one thing that has not changed? Yes, it’s PowerPoint’s tri-paned interface! So, why is the interface called tri-paned? Are there three distinct regions within the PowerPoint 365 for Mac interface? Yes, the Slide Area is one of three principal regions in PowerPoint 365; the other two being the Slides Pane and the Notes Pane. The Slide area is where you work the most, typically through adding and editing slide objects.