You can insert a PDF into a PowerPoint either as an object, and then set it so it opens when you click it.
To loop a PowerPoint slideshow, you'll need to enable looping in the program's "Set Up Slide Show" menu.
Google Slides provides a good bang for your buck. It’s a good-enough presentation tool with an intuitive interface and ...
Apple's iOS 26.1 beta adds a new "Slide to Stop" alarm feature designed to prevent sleepy users from accidentally turning off their alarms.