Lexus RZ450E 2023 Owner's Manual page 328

328
6-2. Using the safe driving support functions
Vehicles without a head-up display

1
Increase set vehicle speed
2 Decrease set vehicle speed
Vehicles with a head-up display

1
Increase set vehicle speed
2 Decrease set vehicle speed
The set vehicle speed will increase or decrease as follows:
Fine adjustment: By 0.6 mph (1 km/h) or 1 mph (1.6 km/h) each time the switch is pressed
Large adjustment: Increases continuously while the switch is pressed and held
 Increasing the set vehicle speed using the accelerator pedal
1 Depress the accelerator pedal to accelerate the vehicle to the desired vehicle
speed.
2
Press the "+" switch.
Canceling/resuming control
1
Press the cancel switch or driving assist switch to cancel control.
Control will also be canceled if the brake pedal is depressed.