Garmin G3X Pilot's Manual page 173

Viewing fuel remaining at each waypoint:
From the Active Flight Plan Page, move the FMS Joystick (right or left) to
quickly change the third data field to Fuel Remaining (FUEL REM).
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First Data
Field
Data Field Selection (Active Flight Plan Page)
Garmin G3X Pilot's Guide
Flight Planning
Second Data Third Data
Field Field
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