Garmin G3X Pilot's Manual page 201

If the VECTORS Softkey is not pressed, the G3X creates a straight-line course directly
to the first waypoint in the approach.
Loading the approach cancels the Direct-to and initiates a route to the FAF.
Cancelling Vectors-to-Final:
From the Active Flight Plan Page (with an approach activated), press the
VECTORS Softkey.
Or:
1) From the Active Flight Plan Page, press the MENU Key.
2) Turn or move the FMS Joystick to highlight 'Cancel Vectors-to-Final' and
press the ENT Key.
190-01115-00 Rev. J Garmin G3X Pilot's Guide
Flight Planning
181