1. Open your event's dashboard and click on the "Event app" section
2. Click on the "Design" section
3. Click on the "Look" section
4. Under Ad banner block, click the "Upload" box to add a banner image. The image must be 640x60px in dimension, and the file needs to be in JPG, PNG, or WebP format and under 5 MB.
5. Click on the "Save design" button to save the changes
