-\begin{twocollist}
-\twocolitem{\textbf{$d$}}{The normalized root mean squared distance measure.}
-\twocolitem{\textbf{$r$}}{The normalized mean absolute distance measure.}
-\twocolitem{\textbf{$e$}}{The worst case distance measure over a \latexonly{$2\times2$}\latexignore{\emph{2 x 2}} pixel area.}
-\end{twocollist}
+\begin{itemize}\itemsep=0pt
+\item[-] \textbf{$d$}\quad The normalized root mean squared distance measure.
+\item[-] \textbf{$r$}\quad The normalized mean absolute distance measure.
+\item[-] \textbf{$e$}\quad The worst case distance measure over a \latexonly{$2\times2$}\latexignore{\emph{2 x 2}} pixel area.
+\end{itemize}
+
+The available commands are:
+\begin{itemize}\itemsep=0pt
+\item Compare Image
+\item Compare Row
+\item Compare Column
+\end{itemize}