How do I show a black screen?
For a black screen, use the following keyboard shortcut: Windows logo key + Ctrl + Shift + B.
How do I change the background in PowerPoint?
On the View menu, click Normal, and then in the navigation pane, click the slide or slides that you want to change. On the Design tab, in Customize, click Format Background. Click Fill, and then click the Solid, Gradient, Picture or Texture, or Pattern option. Choose the background fills that you want.
How do I change the background color of a PowerPoint Design?
Click your first slide, and then on the Design tab, click the down arrow in the Variants group. Click Colors, Fonts, Effects, or Background Styles and choose from built-in options or customize your own.