Garmin G3X Pilot's Manual page 170

GPS Navigation
Symbol Field (Selected)
5) If desired, press the POSITION Softkey and enter the latitude, longitude,
name, or altitude for the waypoint or press the REF WPTS Softkey to enter
a bearing and distance from another waypoint or the bearing from two
other waypoints to define the new waypoint location.
New Waypoint Window
(POSITION Softkey Selected)
(Split-Screen)
6) With 'Done' highlighted, press the ENT Key.
150
User Waypoint Name Field
New Waypoint Window (Symbol Selected)
Garmin G3X Pilot's Guide
New Waypoint Window
(REF WPTS Softkey Selected)
(Split-Screen)
190-01115-00 Rev. J