Re: 767-300 Flight Director
FD switch "on" ......the respective pilot's command bars appear and are positioned by FCC (flight control computer) selected with the Flight Director Source Selector Switch. Command bars operate in current AFDS (autopilot flight director system) mode.
If both FD switches are "off" and you engage an autopilot in CMD, it engages in V/S and HDG HOLD modes, or V/S and ATT if bank angle is greater than 5 degrees.