\item {\tt LOGO}: set display color for logo in {\tt \normindex{ngmx}}.
\item {\tt LONGFORMAT}: use long float format when printing
decimal values.
-
+\item {\tt GMX_COMPELDUMP}: Applies for computational electrophysiology setups
+ only (see section \ref{sec:compel}). The initial structure gets dumped to
+ {\tt .pdb} file, which allows to check whether multimeric channels have
+ the correct PBC representation.
\end{enumerate}