Nextar ME Software Instruction Manual page 121

Scheme
Nextar Navigation System comes with different color schemes for the
map for daytime or night use. Schemes are custom graphic settings
for the map and they can have different colors for streets, blocks or
surface waters in 2D and 3D modes, and they display shades or
shadows in different ways in 3D mode.
One daytime scheme and one night scheme is always selected.
Nextar Navigation System uses them when it switches from day to
night and back.
Track-up map orientation
In Track-up mode the map is rotated so its top always points in the
current driving direction. This is the default orientation in 3D map view
mode. See also: North-up map orientation.
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