Getting Down To Work - Microsoft PowerPoint: Giving the Presentation

Go to the Slide Show tab in the top Toolbar. This bar gives you options to:

start your presentation from different slides.
set up the presentation to be viewed online.
set up the presentation so that you can see your speaker notes but the audience cannot.

Slide Show

To get out of the Slide Show view and back to the editing view, press Esc on your keyboard.