How do I add a banner or hero image to a screen?

To add a banner:

1. Go to App Builder in the top bar
2. Drag a "Container" component to the top
3. Click Edit in the top right corner
4. Upload an image or video
5. Optionally drag in a Title and/or text element
6. In the styling tab you can adjust padding top and bottom to improve the height of the container and position of the elements you dropped in