>rarrow</A>
    <TD><A NAME=d:larrow>larrow</A>
    <TD><A NAME=d:lpromoter>lpromoter</A>
  </TR>
</TABLE>
As the figures suggest, the shapes <TT>rect</TT> and <TT>rectangle</TT> are synonyms for <TT>box</TT>, and <TT>none</TT> is a synonym for <TT>plaintext</TT>.
The shape <TT>plain</TT> is similar to these two, except that it also enforces 
<TT>width=0 height=0 margin=0</TT>, which guarantees that the actual size of the node is entirely determined by the label.
This is useful, for example, when using <A H