Note that each background takes about 2-3 seconds to load onto the slide. Be sure that your account has permission to install add-ons as well as permission to edit the presentation. You can also open an incognito window, log in, and use Slides Backgrounds from there. A workaround for this is to log out of all Google accounts and then log back in to the one Google account you want to use for Slides Background. This is a well-known bug Google is working to fix. Slides Background not installing or not inserting the image onto Slides? We also heard your reviews and created a fresh, clean UI that's easier than ever to use! Drop us a rating and let us know what you want to see next :) Create smooth waves lapping at the shores of your slides using our latest update! This new feature hands you more control with custom adjustments for Waviness, Slope, and Distance, as well as custom colors! Our color picker works in modern browsers such as Chrome and Firefox. WAVES WAVES WAVES! Our newest feature expands Slides Background's material repertoire with a more organic feel. Simply install, run, select your favorite color theme and click Generate to instantly create unique backgrounds for your presentation! Easily generate beautiful material backgrounds for your Google Slides presentations with 16 different color themes and further detailed options.