Lever 1 brake
Lever 2 up-shifting
Lever 3 down-shifting

Just like the mechanical version, the levers are natural and intuitive to use. Activating the levers reproduces and follows the movement of the chain on the sprockets.
For example, lever 2 of the right Ergopower, which is pressed from right to left, moves the rear derailleur and makes chain shift up by one sprocket from right to left, copying the exact movement.