To make a PowerPoint presentation loop, you first want to switch settings on the slide. Click slide show → slide transition to open the Slide Transition dialog box, and select the Check button before every every in the page change. Depending on the content of the playback page, the time to change the page is set when reading. If each slide page to change the time interval settings are the same, as long as click on "All apply" on the line, otherwise it will be based on the content of different slides, set a different show time, each set a good only click the "Apply" button.
Next, you want to set up the show, click slide show → set show mode, open the Set Up Show dialog box, set in show type according to different circumstances.
One setting is to click on the radio button before the speaker Show (full screen), and then click to select the Check button before the "Loop show, press ESC key to terminate" option, which can be terminated at any time by pressing ESC key in playback.
Another way to set this option is to select only the radio button before the "Browse at booth (full screen)" This setting does not press ESC to terminate playback, and if you want to stop playback you can only press CTRL, ALT, and Del to open the Close Program dialog box and select PowerPoint Slide Show- (The file name of the presentation you are playing), click the "End Task" button to terminate the playback.