Symbols (File=>Export=>Memory Map)
This area of the dialog box displays the symbols that will be used to depict the waypoints in Memory Map. These symbols can be any of the 14 shipped with Memory Map, or custom icons that you have created.
Click the Change button to display the Change Waypoint Icons/Symbols dialog box. This allows you to choose icons that are different from the default, and also to choose combinations of icons for different criteria. See the Change Waypoint Icons/Symbols help topic for details.