I watched a thing on Utube that said on those lowrances do not mess with the factory settings because they are set just right to begin with??? My Hummer is set at 10 on a scale of 0-20 so right in the middle and I bumped it back and forth but found the 10 to be about right. I wanna play with the zoom on the DI screen then set the sensitivity more to pick out better views of the structure course you drift past structure so fast often times you don't havt time to do that.