You can copy a slide in the PowerPoint app or online version, and then paste it somewhere else in the slideshow.

Slide Shows in PowerPoint show your presentation on a large screen to your audience; it enables you to move slides in the presentation back and forward to give the audience a better understanding of ...

You can delete a slide in PowerPoint simply by right-clicking on it, or delete multiple slides by selecting them all ...

The easiest way to display a black or white slide in a PowerPoint presentation is by using keyboard shortcuts. When running a slideshow, simply press the W key for a white slide and B for a black ...