From the left sidebar under App Settings, select Home Screen, and then + Add new card button

The Custom Button window will appear. Here you will choose what kind of card you'd like to appear on the Home screen. You can create cards that link to various pages of the app, tours, Custom Pages, etc.

Upload an image that will appear as the card on the Home Screen.

You can add multiple card buttons to the Home Screen.

Click Save Changes when you're done.

Your new Home Screen card can now be toggled on or off, edited, or deleted.