Map Features
Click 'Map Features' in the upper Menu-Bar to access the various sub-menu items: 'Hide Online State Polygons', 'Clear Online State Polygons', 'Hide Online County Polygons', 'Clear Online County Polygons', 'Hide Online Grid Locators', 'Clear Online Grid Locators', 'Clear All Markers', 'Hide Waypoint Markers', and 'Clear Waypoint Markers', 'Hide Track Markers', 'Clear Track Markers'.