Garmin G500 Pilot's Manual page 90

Field of View
The PFD Field of View used for the Garmin Synthetic Vision Technology
(SVT™) option (when enabled) can be represented on the MFD Navigation Map
Page lateral image. Two dashed lines forming a V-shape in front of the aircraft
symbol on the MFD, represent the forward viewing area shown on the PFD.
Figure 3-40 Navigation Map Field of View Selection
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Garmin G500 Pilot's Guide 190-01102-02 Rev. B