Humminbird NS 10 Operation Manual page 53

Press ENTER when the parameter is selected. This will prompt the adjustment menu for the
selected parameter.
Use the up/down arrows to adjust the setting to BLACK or WHITE.
Press ENTER when the setting is correct. This will return you to the MAP SETUP menu.
Use the up/down arrows to select your next parameter needing adjustment. Continue as before
until you have made all necessary adjustments.
If your adjustments are complete press MAP to returned to the graphic area.
The following adjustment menus are available in your MAP SETUP menus.
Use the up/down arrows to adjust gridlines, select ON to make them visible or OFF to hide them.
Press ENTER to continue.
Use the up/down arrows to turn your course projection line ON or OFF then press ENTER.
Use the up/down arrows to turn all routes ON or OFF then press ENTER.