1. On the event dashboard, click on "App content" from the left sidebar menu.
2. Click "Forum" to configure the Forum settings.
3. Click on "Banners" to configure banners for your forum.
4. Click on "Add a banner" to add a banner in the required dimensions mentioned.
5. Adjust the banner and click on crop and use to apply the banner.
6. Click on "Save" to save the changes made.
