I normally use...:

Inverse pallette
800kHz SI
200kHz 2d
Max Depth 80ft (deepest part of my home lake is 70ft)
SI Range 60-75ft (1 side only IF searchin for bream beds)
Sensitivity to match bottom hardness
Contrast 10-12
Sharpness Off (unless I want the white fish echoes to pop out better)

Rickie