Click the background to clear the selection ... right-click any of the selected items, and choose Format Object. PowerPoint will let you set and change properties that the objects share.

Here's how to do it. Step 1: Open your Powerpoint document and select the slide that you want to change the background for, on the left-hand side. In this example, we're using the standard ...

How to use a video as a slide’s background ... the slide and choose a color that complements the video in the first slide. Enter a text box that contains your message. Use PowerPoint’s Merge ...