Garmin G3X Pilot's Manual page 292

Additional Features
Flight
Path
Marker
Wind
Vector
Activating and deactivating the flight path marker:
1) From the full-screen PFD and/or split-screen PFD Page, press the MENU
Key.
2) Move the FMS Joystick to highlight the 'Flight Path Marker' field.
3) Turn the FMS Joystick to highlight 'On' or 'Off'.
ZERO PITCH LINE
The Zero Pitch Line is drawn completely across the display and represents the
aircraft attitude with respect to the horizon. It may not align with the terrain horizon,
particularly when the terrain is mountainous or when the aircraft is flown at high
altitudes.
270
Flight Path Marker (PFD or PFD Page)
Garmin G3X Pilot's Guide
Airport
Runway
190-01115-00 Rev. K