Help System (web edition)

POLYGONS=<list_of_polygon_specifications> 
gives a list of polygon definitions for the current graph. Each
member of this list is a word (name of the polygon) and any such a definition
must be given in the form

   <name_of_the_polygon>=<x1>,<y1>,<x2>,<y2>,...,<xn>,yn>,<fill_index> 

where <xi>,<yi>, i=1,2,...,n are the vertices (in plotting units)
of the polygon to be plotted and the optional <fill_index> gives
the fill type.

   P = More information about polygons