Garmin G3X Pilot's Manual page 277

The color of the rectangular boxes may be magenta, green, or white depending
on the route of flight and navigation source selected. The active GPS or GPS overlay
flight plan leg is represented by magenta boxes that correspond to the Magenta CDI.
A localizer course is represented by green boxes that correspond to a green CDI. An
inactive leg of an active flight plan is represented by white boxes corresponding to a
white line drawn on the Navigation Map indicated an inactive leg.
Pathways provide supplemental glidepath information on an active ILS, LPV, LNAV/
VNAV, and some LNAV approaches. Pathways are intended as an aid to situational
awareness and should not be used independent of the CDI, VDI, glide path indicator,
and glide slope indicator. They are removed from the display when the selected
navigation information is not available. Pathways are not displayed beyond the active
leg when leg sequencing is suspended and are not displayed on any portion of the
flight plan leg that would lead to intercepting a leg in the wrong direction.
Activating and deactivating pathways:
1) From the full-screen PFD and/or the split-screen PFD Page, press the MENU
Key.
2) Move the FMS Joystick to highlight the 'Pathways' field.
3) Turn the FMS Joystick to highlight 'On' or 'Off'.
190-01115-00 Rev. J
Pathways (PFD or PFD Page)
Garmin G3X Pilot's Guide
Additional Features
Selected Altitude
Pathways
257