I was answering you question, so this command is for parking brakes.
On an airliner, when touching down :
-Autobrakes activate if you've set autobrakes between 1 and 3. 3 is only for dry runways.
- spoilers deploy automatically if you've armed them. To arm them : one more crank to retract, when already retracted
-Reverse is triggered manually, you can add full thrust to decelerate faster, but only above 80 knots, so that dust, gravels and hot air don't enter the engine.
-if you manually press the wheel brakes, autobrakes will disengage.
-parking brakes are only used when parked.