Continuous playback of slides in PowerPoint

Select All slides, click menu, and slide show _ slide switch. In the displayed pane, you can change the slice. Do not select [when you click the mouse].
You can choose the [every other] function and enter the playback interval in the input box on the right to achieve continuous playback of slides. Of course, the animation function in each slide cannot be selected.
[When you click] (Note: This is the start option, under the add effect button), select [before] or [after]
 
After the animation effect is designed for the slide, deselect "when you click the mouse" in "Animation"-"change method", and then in: "Slide Show"-"set the show mode"
() Check "loop show, Press ESC to stop", so that the slides can be played continuously.