GPSMAP 176/176C Owner’s Manual 63M AIN MENU > M AP TABMap TabGeneral TabMap Tab of Main MenuDetail—Most, More, Normal, Less, Least: controls how much mapdetail you see. This setting only applies to any map feature set toAuto. Those features which have a specified range or are turned Offare unaffected by this setting.Orientation—North Up: fixes the top of the map display to a northheading; Track Up: fixes the top of the map display to the currenttrack heading; Course Up: fixes the map so the direction of navigationis always “up” and turns the navigation leg line vertical on the screen.Color Mode—Water Mode or Land Mode: when in Water Mode,land appears dark and water is light. In Land Mode, land appearslight and water is dark. If using optional BlueChart data, WaterMode is recommended.AutoZoom—On/Off: when On the map automatically adjusts thezoom range to a lower range as you approach you destination point.Map TabBasemap—On/Off: turns the built-in basemap on or off.Data Card Maps—On/Off: turns all optional BlueChart/MapSourcedata on or off.Lat/Lon Grid—Off, Auto, 20 ft–800 mi: sets the maximum range atwhich the feature appears on the screen. Some types of data are onlydisplayed at certain zoom ranges.Grid Labels—Off, Auto, 20 ft–800 mi: sets the maximum range atwhich the feature appears on the screen. Some types of data are onlydisplayed at certain zoom ranges.