An electronic device includes a display, one or more processors, and memory storing one or more programs configured to be executed by the one or more processors. The one or more programs may include instructions for displaying a live video communication user interface that includes concurrently displaying representations of a first, second, and third participant in the live communication session. While displaying the live video communication user interface, the one or more programs may also include instructions for include receiving data indicating that an activity level of the second participant has increased above the activity level of the first participant. Further, in response to receiving the data, the one or more programs may further include instructions for changing a size and/or position of the representations of the first, second, and third participants.