The following:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node (dl) at (-1,0) {dl};
\node (dm) at (0,0) {dm};
\node (dr) at (1,0) {dr};
\node (ul) at (-1,1) {ul};
\node (um) at (0,1) {um};
\node (ur) at (1,1) {ur};
\draw (dm) -- (ul) -- (dl) -- (um) -- (dr) -- (ur) -- cycle;
\end{tikzpicture}
\end{document}
produces
If I understand the manual correctly, -- cycle; in the code should produce additional line joining "ur" back to "dm". Why is it not there?
