How to Change Background Color of Slide in Google Slides? Plus, I’ll also share with you three different but easy methods to add an image as a background to your Slides! In this article, we shall take a detailed look at the process of changing the background of a slide in Google Slides. Here, you can change the color or add an image as the background of a slide. From the options that appear, click on the “Change Background” option. To change the background of a slide in Google Slides, first, select the slide and right-click on it. Whatever the case may be, to do that you need to know how to change the background in Google Slides! Perhaps you may want to break the monotony, or maybe you want your presentation to stand out. When working on a Google Slides presentation, there are times when you don’t want to use the standard white background.