for up and down its the throttle on your joystick... Like the throttle for the plane... But in the Heloworld its called "Collective" or "Pitch"
The Throttle in the Heloworld is the RPM from Turbine and Blades.
With turbine Helos they are always on 100% during flying, takeoff and landing. Only on the Ground you go to less. But usually you need only 0% or 100%.
In the newer Helicopters, like the new Bell 429, or AS350B3e you have only a 3way switch for Stop, Start/Idle and Flight.
With Pistons you need to do the work from the Governor by Hand... So when you raise the collective, you also need to add more Power to the Pistonengine...