You can navigate to different screens during an active call for activities such as viewing contact details or events, adjusting badge settings to responding to a notification, and so on.
The steps you perform is subjected to the action you want to perform.
In this example, Josh McNab is in a call with Hannah Smith, and he is navigating to the Home screen to refer to a message he received earlier.
The Home Screen appears.
The Home screen with the filtered messages appear.
The Call Screen appears.