You can run your presentation in PowerPoint for the web with an Internet connection and a web browser.
Start a slide show
To start your slide show, on the Slide Show tab, select Play From Beginning.
(If you've turned off the Simplified Ribbon, you don't have a Slide Show tab; instead use the View tab to start Slide Show.)
To manage your slide show, go to the controls in the bottom-left corner and do any of the following:
Go to the previous slide
Go to the next slide
View all slides
To skip to a particular slide, simply click it in this Grid view.
Turn subtitles on or off
End the slide show
To skip to any slide in the presentation, right-click the screen and select Go to Slide. Then, enter the slide number you want in the Slide box, and select OK.
Loop a slide show
Looping a slide show isn't supported in PowerPoint for the web. To cast your vote for this feature, please go to the Support continuous slideshow loop post in our online Suggestion Box and click the Vote button.
You can show your presentation to an audience with PowerPoint Mobile.
On the Slide Show tab, in the Start Slide Show group, select From Beginning or From Current Slide.
If you have a two-screen setup in which you are projecting from your device to a large screen, you can see Presenter View visible on your device while your audience sees the slide show on the large screen. Presenter View allows you to see your notes, get a preview of the upcoming slides, and turn ink tools on and off.
On the Slide Show tab, select Use Presenter View.
Navigate through your slides
To move forward through the slide show, press the spacebar on the keyboard or tap the screen.
To go the previous slide, press P.
To exit Slide Show, press Esc.
To make the screen go black, press B. Press B again to make the current slide visible again.