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Turning on the Backlight
The GM-120 is quipped with a built-in backlight to illuminate the screen
when you are using it in poor lighting conditions. Press and hold the
Backlight button to turn the backlight on or off as required.
The backlight status is displayed as the icon on the bottom left corner of the
screen.
Adjusting the Screen Contrast
To adjust the contrast of the LCD screen:
1. Press the Menu button twice to display the OSD
menu.
2. Select LCD Level and press OK to confirm. A
LCD scale bar is displayed on the map page.
3. Use the navigation keys to adjust the LCD level.
Press the navigation key to the right to increase
the LCD contrast and to the left to decrease the
contrast as required.
Using the GM-120 in Simulation Mode
In normal or navigation mode, the GM-120 tracks its position through
satellite information. In simulation mode, the device stops acquiring data
from the satellites. When you are planning a trip, use the simulation mode
to look up maps, to adjust system settings, and to conserve battery
consumption.
You can switch to simulation mode with one of the
following ways:
To switch to simulation mode from the satellite page:
1. Press the Menu button to display the OSD menu.
2. Use the navigation keys to select GPS Off and
press OK to confirm. The device stops acquiring
satellite information and enters simulation mode.