fishing was slow yesterday so I was playing with the settings on my lowrance 520c and wondering what everyone uses for settings as far as the sensitivity, colorline and background. I like to run the blue back ground it seems to me to be the easiest for me to read, I have tried white but it seems that the colors are not as good with white as blue, am I missing something running blue. Sensitivity  I have around 90 to 95 for mostly fishing 20ft to 40ft and I have that on manually not auto. The color line I was messing with that and the higher I put it the more yellow the marks got, I had a lot of marks at 30ft in 40ft of water, they were red with no yellow in them until I changed the color line, I don`t think they were walleyes maybe bait or white perch couldn`t get them to bite.