NTF_DISPLAY_TYPE Missing In 3.4.6

I have a Pixhawk 1 with Arducopter 3.4.6 installed, and I am unable to find the NTF_DISPLAY_TYPE param. Is this a 3.5.x only feature? Thanks!

Yes 3.5 and above:
See:
http://ardupilot.org/copter/docs/common-display-onboard.html?highlight=display