Garmin G3X Pilot's Manual page 301

Enabling/disabling OBS Mode (with external GPS navigator config-
ured):
1) EXTERNAL NAVIGATOR: Press the OBS Key. The 'Set OBS and Hold' Active
Flight Plan Page menu option is now available.
2) G3X: Turn the FMS Joystick to select the desired course to/from the
waypoint.
VOR MODE FOR NAVIGATION
VOR Mode can be used for navigation when an external navigation receiver is
configured.
Navigation
Mode Active
Selected
Navigation
Source
Navigation
Mode Softkey
190-01115-00 Rev. G
Integrated Autopilot
Garmin G3X Pilot's Guide
283