
Filtering Targets:  To display friendly targets, press lower case "f". To 
filter out friendly targets, press upper case "F". Press lower case "h" to
display hostile targets (upper case "H" to filter out hostile targets), 
and press lower case "u" to display unknown targets (upper case "U" to 
filter out unknown targets). You will be able to tell which targets you 
have toggled by the respective "F", "H" and "U" characters located on the 
left border of the map screen. These characters are black when the 
respective targets are visible on the map, and light green when they are 
filtered out. Clicking on the characters with the left mouse button 
displays the symbols, and clicking with the right mouse button filters 
them.

Range and Magnification:  The number in the lower right corner of the 
target grid signifies the number of nautical miles each square represents 
on the screen. The distance can be changed by clicking on the number. You 
can also enter "Shift-8" (*) to magnify the screen, or press "/" to de- 
magnify the screen. The possible values for each square are 1, 2, 5, 10, 
20 and 50 nautical miles. 

   NOTE:  The maximum range is 500 nm, the minimum range is 2 nm, and the 
default range is 80 nm.

