To loop a PowerPoint slideshow, you'll need to enable looping in the "Set Up Slide Show" menu. Once you set your PowerPoint to loop, it'll start over from the beginning automatically after playing the ...
One of the coolest PowerPoint slideshows I have ever seen is one of PowerPoint’s own templates; it’s called “Duarte’s Five Rules.” It uses animation, graphics, fonts, layout, design, sound, narration, ...