Originally Posted by
LLuCCiFeR
Some 744s don't even have a PTT button on the glare shield, so you either have to reach down to the radio panel, and thus effectively not being able to use that arm for anything else and taking your eyes off the PFD and ND, or you have to use the PTT switch on the yoke with the possibility of interfering in the controls of the PF.
Not a problem at all. When the clearances get more busy while on vectors, the one hand is already down by the PTT switch waiting to be used in immediate response to an ATC instruction(instead of the delayed response you get from some people) while the other hand writes down the clearance. Works from either seat if you can write with either hand.