2.The ColorLine Control Bar appears. Press ↓ to decrease ColorLine; press ↑ to increase ColorLine.
3.When it's set at the desired level, press EXIT.
Thin or no ColorLine
Wider ColorLine
At left, little ColorLine indicates a soft bottom, probably sand or mud.
At right, the wider ColorLine indicates a harder, rocky bottom.
Contrast
To adjust the display's contrast:
Press MENUMENUENT. The CONTRAST slider bar appears. Press ↑ or ↓ to move the bar. The lower end of the scale is minimum contrast; the upper end is maximum contrast. When contrast is set at the desired level, press EXIT.
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