First, make sure that you have logged in to your Symbaloo account, then click the Edit Webmix button
You will be able to select any of our predefined images, upload your own and/or set just a colored background.
NOTE: When you upload your own background; the recommended image size is: 308×150 pixels
Recommended file type: GIF, JPEG, PNG, WEBP
Please feel free to reach out if you need extra help; we would be happy to assist you.