Display Map Boundaries
Display Map Boundaries (M)
The Display Boundaries command causes Map boundaries to be displayed in all
map windows. Thus you can view the locations of maps in relation to each other,
and watch a vehicle's proximity to a map without the vehicle actually entering
the map's area.
If the Map Boundary Display is turned on, the Display Boundaries command will
turn it off.
You can toggle the Map Boundary display by simply pressing the "M" key on your
keyboard.