REF=shapes.html#html>HTML-like labels</A>.
Also, unlike the rest, we have shown these three, as well as <TT>underline</TT>,
without <TT>style=filled</TT>
to indicate the normal use. If fill were turned on, the label text would
appear in a filled rectangle.
<P>
The geometries of polygon-based shapes are also affected
by the node attributes 
<A HREF=attrs.html#d:regular><TT>regular</TT></A>, 
<A HREF=attrs.html#d:peripheries><TT>peripheries</TT></A> and
<A HREF=attrs.html#d:orientation><TT>orientation</TT></A