Chevrolet 2011 Corvette Navigation System Navigation Manual page 75

When handling the DVD map disc,
be careful of the following:
Handle the disc very carefully
to avoid contamination or flaws.
Signals may not read out
properly if the disc gets
contaminated or flawed.
If the disc gets soiled, use a
soft cloth to gently wipe it out
from the center of the disc
to the outside. Do not use
photographic record cleaner,
solvents, or other cleaners.
Do not use the disc to rest on
while writing or drawing using
any writing utensil or attach
a seal to any of the sides or
the disc.
Do not keep the disc in direct
sunlight, high temperatures,
or humidity.
After using the disc, place it
back into the original case.
See
for information on changing the
search area.
The system lets you adjust the scale
of view on the map. Also, as you
drive, the map scrolls automatically
based on the direction you are
traveling.
To view a larger or smaller scale
of the map, touch the map scale
arrows.
Change the level of map detail by
either zooming in or zooming out
using the arrow screen buttons
or by touching the scale on the
bar. The system adjusts the map
accordingly. The scale of a map can
range from 1/32 of a mile (0.05 km)
to 128 miles (256 km).