“Adjust Back Light Level” label. The screen shown at right ap- pears. Now press the left ar- row key to decrease the light level. Press the right arrow key to increase it.The percentage of back light in use changes as the arrow keys are pressed. The bar chart also gives a graphical indication of the level. After you’ve made the adjustment, press the CLR key to erase the menu.
SPEAKER VOLUME
To adjust the
UNITS OF MEASURE
When the optional speed/temperature sensor is connected, the
To change the units of measure, first press the menu key two times. Next, press the key adjacent to the “Units of Measure” label. The screen shown below appears. The check
mark in the box on each line shows the unit of measure currently in use. In the screen shown below, the units of mea- sure are in feet for the depth, temperature in degrees Fahr- enheit, speed is in statute miles per hour, and log is in statute miles.
Press the key adjacent to the unit that you wish to change.
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