Garmin G3X Touch Pilot's Manual page 107

Altitude—Enter the desired reference waypoint altitude. Select 'Above
•
Waypoint' to use field elevation for airports in the navigation database or
'MSL' to specify an exact MSL altitude target.
Some waypoints such as intersections do not have an altitude
NOTE:
in the database and thus only the VNAV altitude in MSL (not Above
Waypoint) may be specified for these waypoints.
By—Enter the target location with settings of distance 'Before' or 'After' a
•
reference waypoint. To set a target location at a reference waypoint, enter a
distance of zero.
VNAV Messages—Select 'On' or 'Off' to enable/disable VNAV alert messages.
•
Forcing capture of the VNAV profile:
1) While navigating a flight plan or Direct-to, press the MENU Key twice.
2) Touch VNAV and enter a valid VNAV profile and begin navigation.
3) From the Vertical Navigation Page, press the MENU Key.
4) Touch Capture VNAV Profile. Selecting Capture VNAV Profile centers
the VNAV indicator.
Canceling the VNAV profile:
1) While navigating a flight plan or Direct-to with a valid VNAV profile, press
the MENU Key twice.
2) Touch VNAV.
3) Press the MENU Key.
4) Touch Cancel VNAV Profile.
190-01754-00 Rev. L Garmin G3X Touch Pilot's Guide
Flight Instruments
87