You can add custom covers to all of your apps.*
First, design your image.
Custom covers should be 640 pixels wide by 920 pixels tall.
We will scale any custom cover images to the correct dimensions if it can be done without distortion. However, images that are exactly 920 by 640 pixels will yield the best results.
When you're in the editor, click "Add a Custom Cover" to the side of the cover editor. Then, upload your formatted image above and voila!
If at any point you want to return to the standard cover, click 'back to Standard Cover' under the 'Edit Custom Cover' button.
NOTE: switching back to Standard Cover will override your custom cover. To re-upload the cover, start from the top.