TOPOGRAPHICAL MAP 
MODIFICATIONS ANDOVERLAYS

With the map on the screen a 
number of modifications and 
overlays are possible.

With the map on the screen, hit 
the ‘space bar’ which will cause 
a pop-up window to show.  You 
can use the arrow keys to 
highlight the choice of change 
you want.  You can obtain the 
same results by hitting the 
appropriate F or other key on 
the key board. 

The ‘esc’ key removes the pop-up 
screen.