Preflight and postflight crew duties are divided between the Captain and First Officer. Phase of flight duties are divided between the Pilot Flying (PF) and the Pilot Monitoring (PM). Each crewmember is responsible for moving the controls and switches in their area of responsibility. …The general PF phase of flight responsibilities are:
1) taxiing;
2) flight path and airspeed control; 3) airplane configuration; 4) navigation. PF and PM duties may change during a flight. For example, the Captain could be the PF during taxi but be the PM during takeoff through landing.