Reading view is the default view in PowerPoint for the Web. It is similar to the Slide Show view in some ways because, in both views, the slide is shown in full-screen mode. However, in Reading view, you also see the PowerPoint Title Bar and the Status Bar at the top and bottom of the interface respectively.
Learn about Reading view in PowerPoint for the Web.
You May Also Like:
Interface in PowerPoint for the Web
Presentation Gallery in PowerPoint for the Web
Open PowerPoint File from OneDrive within Desktop Application

