A head up display (HUD) system within a vehicle includes a controller adapted to initialize HUD graphics to be displayed by the HUD system within the vehicle, a projector adapted to project HUD graphics within a field of view of the HUD system onto an inner surface of a windshield of the vehicle, and a monitoring system adapted to collect real-time data of a head position and gaze direction of an occupant within the vehicle, wherein, the controller is further adapted to adapt the displayed HUD graphics, displayed by the HUD system, based on the real-time data of the head position and gaze direction of the occupant.