Click your account icon in the bottom right corner. 2. Select Settings. 3. Click Wallpaper. 4. You could pick any of Google's pre-loaded backgrounds, but let's have some fun and Click Custom to use an image we saved from a website. 5. Click the + button. 6. Click Choose File. 7. Pick the image file and hit Open. 8. Select a position, for our sake, we'll try Center, which zooms in larger images. 9. Closeout of all windows.