1. INTERACTIVE ISOPHOTE CURSOR OPTIONS

?          help
o          zoom Out (display fresh image, reset zoom)
q          Quit
r          Roam (re-display with centering)
z          Zoom in

2. INTERACTIVE ISOPHOTE COLON COMMANDS

Parameters are listed or set with the following commands,
which may be abbreviated.  To list the current value of a parameter type
the command alone. 

:color [value]          Set/show current graphics color 
:dispars parameters     Set command-line parameters for display/contour tasks