Change the Background for Individual Slides
If you want to change the background for a single slide or give each slide its own look, you can pick from colors, gradients, patterns, and more. You’ll see the change apply to the slide immediately, so if you change your mind, you can revert it. To return the background to its original appearance, select Reset Background at the bottom of the Format Background pane.
Change the Background for All Slides
To keep your presentation’s appearance consistent, you might want to change the background for all slides to match. You can use the same options, colors, gradients, or patterns for every slide in the show. To return all slides to the original background, choose one of the slides and change the background in the sidebar. Then, pick Apply to All. If each slide had a unique background before you made the change to all slide backgrounds, you’ll need to revert each one individually. The Reset Background button mentioned above is only available for single slides. Tip: If you didn’t make any other changes to your slideshow after adjusting the background, you can use the Undo option in the Quick Access Toolbar. Whether you want to use your company’s colors, insert a watermark, or apply an attractive gradient, you can change the background on a PowerPoint slide in just a few steps. For more, look at these tricks and tips for improving your PowerPoint presentations.