Garmin G500 Pilot's Manual page 85

Terrain Data
The Terrain Data option selects whether Terrain Data is shown on the
Navigation Map. The Terrain Data Icon will be shown when Terrain has
been selected.
Terrain Data On
Terrain Data Off
Terrain Data
Terrain Elevation Scale
Terrain Data Icon
Figure 3-31 Navigation Map Terrain Data
Figure 3-32 Navigation Map Terrain Data Selection
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190-01102-02 Rev. B Garmin G500 Pilot's Guide