The "Map" window shows a map of known locations around the aircraft.
In the upper left part of the map are some yellow areas that can be used to modify the map (just click on it with the left mouse button).
The [+] and [-] areas are used to zoom in and out.
The letter areas are used to select the types of locations to be shown ([A]=Airports, [N]=NAV aids, [C]=Cities, [M]=Mountains and valleys, [W]=Water related, [S]=Spot feature). These areas have three different states: "hide", "show" and "show with name".
Tip: Font name and size can be changed in MyFsTools.ini