Under 'Change theme' there are different layouts for your app available. With one click, you can change the header image and color design.
- Navigate to the App Designer (step 'design' in the top menu bar).
- Click Change theme in the list on the left side of the page.
- Select a theme.
- You will see the result immediately in the preview below and can refine it even further.
Please note that changes previously made are discarded.