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.

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.

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 template for an ...

Enter a text box that contains your message. Use PowerPoint’s Merge Shapes to “cut out” the text, so you can see the slide’s background through the transparent text.