The logical coordinates (determined usually by the MODE specification)
of a point clicked by the mouse in a Survo graphics window can be saved
as a text file by giving a specification
MOUSE=<pathname_of_file>
in the GPLOT scheme.
The information is saved in the text file as a single line of the form
<# of window> <L or R> <x coordinate> <y coordinate>.
The button pressed is indicated by L (left) or R (right).
The MOUSE specification is intended for sucros working with graphics
windows and enables mouse-controlled activities with Survo graphics.
S = More information on GPLOT specifications