15.65.2  CURSOR 

     SHOW CURSOR

This puts a cursor on the graph.  After moving the cursor to  the  desired
location, press any key.  The current location of the cursor will be typed
and entered into the journal file as a comment.  This does not work if the
device  has no cursor.  If you have not plotted any data this command will
not work.

The position of the cursor is given in both TEXT and DATA units.  If a 3-d 
plot is displayed, The X,Y,Z given are  on  a  plane  through  the  origin
parallel to the screen.