Garmin G3X Touch Pilot's Manual page 326

AFCS
Hollow Single Cue Command Bars (Pilot Hand Flying Aircraft, FD Only)
D C
UAL UE
The Dual Cue Command Bars are useful to visually separate pitch from roll when
flying the aircraft by hand.
Dual Cue Command Bars
If the attitude information being sent to the flight director becomes invalid or
unavailable, the Command Bars are removed from the display.
304
Garmin G3X Touch
Solid Single Cue Command Bars (Autopilot Engaged)
Aircraft Symbol
Command Bars (Single Cue)
Command Bars (Dual Cue)
™ Pilot's Guide for Certified Aircraft
Dual Cue Command Bars
190-02472-00 Rev. D