For the most part I run my touch units in auto. However for the side and down scan I normally set the range and contrast to manual, I like the contrast in the 55-65 range for the brown pallet. Also the shallower you are the less contrast you need and the less (side scan) range you can use.
My advice is to get out on the water and start changing things to see what appeals to you. If you get it to far out of whack just restore the factory defaults.


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