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Use a fat font. To begin, add a new blank slide. Later, you’ll delete this slide, but it’s easier to work on a blank slide than on top of the water video. To add the text effect, do the following: ...

Launch Microsoft PowerPoint, and open the PPTX file for which you want to use a GIF as the background. Select the appropriate slide. Click the "Design" tab, and locate the "Background" section.

However, if you want to apply the gradient to all the slides in your presentation, then you need to click on the “Background” option and finally select the “Add to theme” button.

How to change the background of your PowerPoint slides 1. Open PowerPoint on your Mac or PC and create a new presentation or open one you've already started.

1. Open Google Slides on your PC or Mac computer and create or open a Slides presentation. 2. In your presentation, select the slide (s) that you want to change the background for.