The system has four modes.

Mode 1 is the default when you turn the car on. Full traction control and full active handling.

Mode 2 is one press of the button which is traction control off Active Handling on.

Mode 3 is two presses in five seconds. This is traction control off and active handling in competitive driving mode which will give you greater tolerances for sliding sideways (what you want on a road course)

Mode 4 is to press and hold for greater than five seconds. This will be traction control and active handling off. No intervention from either system.

Traction control is just that. It senses rear wheel spin (loss of traction) and will take appropriate action to reduce said wheel spin. It will pull timing to limit wheel spin. It monitors the ABS sensors and the wheel speed sensors along with RPM.

Active handling takes input from several sensors in the vehicle. It pays attention to wheel spin, rpm, throttle input, brake input and yaw (departure angle of the nose of the vehicle from straight.) The car will take what it believes to be appropriate actions including applying individual brakes and reducing throttle input. The F55 in addition will vary individual shock damping to allow the car to plant an individual wheel to regain better control if it senses the car being loaded in a given direction.