1 \section{Numbering of the vertices}
3 There is an option that permits the marking of the \Index{vertices} (with a black circle) and/or numbers them either globally or individually.
5 \item \texttt{\Lkeyword{show}=all} marks all the vertices;
6 \item \texttt{\Lkeyword{num}=all} numbers all the vertices;
7 \item \verb+show=0 1 2 3+ marks the vertices with the index number 0, 1, 2 and 3;
8 \item \verb+num=0 1 2 3+ numbers the vertices with the index number 0, 1, 2 and 3.
11 \begin{LTXexample}[width=6cm]
12 \begin{pspicture}(-3,-2.5)(7,2.5)
13 \psset{viewpoint=50 20 20 rtp2xyz,Decran=40}
25 \begin{LTXexample}[width=6cm]
26 \begin{pspicture}(-3,-2.5)(7,2.5)
27 \psset{viewpoint=50 20 20 rtp2xyz,Decran=40}