To set up your In App Inbox on the platform go to your project home and navigate to App Settings > Inbox Settings.
To Enable it select enabled on this page.
Then select a style from:
Choose whether the inbox slides in from the left or right.
Choose whether the header has a button that allows you to opt in or out of notifications.
Click Save when you are happy with your selection to save your settings and enable the inbox.
Sample custom settings
The Light and Dark options have a standard look and feel as shown below:
If you choose to have a custom style then you can change the color of a number of elements, customisable elements of the inbox are outlined below:
The following is an example of a custom inbox styled with the custom inbox settings shown in the first screenshot above: