You need a second display if you want to present one screen and work on another. To do it, follow the steps below. Connect your computer to a second display. Open your PowerPoint presentation. Go to the Slide Show >Set Up > Set Up Slide Show. In the Set Up Slide Show > OK. Start the slideshow and choose From Beginning, then press the F5 key to refresh the page. The slideshow will now appear on the second screen, but your PowerPoint interface will stay visible on the primary screen. You can scroll through the slides on the secondary screen while working on the PowerPoint file on the primary screen.