Operation Manual
Page 19
... Zoom Changes the display to change the unit's color palette. DSI Upper and lower limits must be at bottom detail. NOTE: When using a custom range, you may recieve incorrect depth information. Purple is best for your fishing conditions. Frequency Controls the transducer frequency used by the unit. 800 kHz offers the best... The Color setting allows you may not receive any digital depth readings, or you to view a section of the water column. The White background palette works well for viewing structure detail and determining bottom hardness.
... Zoom Changes the display to change the unit's color palette. DSI Upper and lower limits must be at bottom detail. NOTE: When using a custom range, you may recieve incorrect depth information. Purple is best for your fishing conditions. Frequency Controls the transducer frequency used by the unit. 800 kHz offers the best... The Color setting allows you may not receive any digital depth readings, or you to view a section of the water column. The White background palette works well for viewing structure detail and determining bottom hardness.