From the LiveScope or Perspective sonar view, select Options > Sonar Setup > Appearance.

Color Scheme

Sets the color palette.

Color Gain

Adjusts the contrast of colors shown on the screen.

You can select a higher color gain value to see minor variances in targets with large color changes. You can select a lower color gain value to see more similar colors in the same situation.

Trails

Sets the how long the trails appear on the screen. The trails show the movement of the target.

Bottom Fill

Colors the bottom brown to distinguish it from the water returns. Not available in Perspective mode.