Driving – Select this option if you are driving in the session to ensure there is no delay in the data displayed by the overlay.
Spectating – When spectating in iRacing the view is delayed by one second. This setting delays the display of the data received from iRacing by one second to ensure the view and data are correctly synced.
Live Session – Select if you are in a live iRacing session to display live race data.
Replay File – Select if you are viewing a replay file to display “live” race data.