Elevator: Used by pulling back or pushing forward the joystick. Controls pitch.
Rudder: Used by pushing rudder pedals or twisting the joystick. Controls yaw.
Ailerons: Used by pushing the joystick left or right. Controls roll.
Flaps: Surfaces on the wings that move to adjust the lift the wings provide. Adjusted with the Flaps keys.
Trim: Controls adjustment of other control surfaces that are vital to maximizing aircraft performance. Controlled with the Trim keys.
Throttle: Used by moving throttle lever on joystick system. Controls fuel fed to engine.
Supercharger: Used by using the Supercharger keys. Control air pressure of air fed to engine.
Mixture: Used by using the Mixture keys. Controls fuel fed to engine for a given throttle amount.