Set here how the coordination polyhedra are shown.
Style
When the option 
Solid is choosen, each polyhedron is
represented as a solid volume, that users can see from the 
outside or from the inside.
When the option 
Wired is choosen, only the face contours 
are shown, thus producing a more light representation.
Color
The 
Color button controls whether the polyhedra are represented
with their own, independent color, or inherit it from the default
color for the neighbour element, or, when this is undefined, from the
current color of each central atom (not necessarily the default color
for its element).
R, G, B
The 
R, 
G, 
B entries define the Polyhedron color:
(0.0, 0.0, 0.0) is black and (1.0, 1.0, 1.0) is white. It is used 
to draw the lines in wired mode, and the solid faces in solid mode.
In the last case, lines are drawn using the current layer background 
color, to get a good contrast and eliminate the need to define yet 
another color.
Scale
When polyhedrons are linked in 
Independent mode, the 
Scale
factor can be used to change its size, including its child objects.
Polytope group objects are scaled around its center.
When polyhedrons are linked in 
Automatic mode, only its parent
objects can be scaled (thus changing the size of all its child objects,
including the polyhedron), and the 
Scale entry is disabled.
The visual representation of an object is always scaled by its own scale 
factor multiplied by the scale factor of all its parent objects until layer,
inclusive.