This great feature allows you to set up to three images on your App's homepage header in order create a compelling slideshow. This will make it easier for your users to navigate your app and make sense of it by simply looking at it.
How to set it
Go to the Look & Feel section of your App from your dashboard, by clicking on the corresponding tab at the top:
Then click on Home Page from the sidebar on the left:
And finally upload your images by clicking on Change (grey button).
You can upload up to three images at the moment.
Make sure the size of the images doesn't exceed 1M and is at least 640x in width: