Call signs can now have icons assigned to them to more easily identify their current status. At the moment, we have all our call signs set to display a person, possibly indicating that all users in that callsign are on foot.
Let's say our First Aid callsign joins an ambulance crew in their vehicle while transporting a patient to hospital. To change the callsign icon, click on the callsign you want to edit, then select the new icon for your callsign (in this case, an ambulance).
The callsign icon now displays as an ambulance.