while investigating in my grid layout problem I found a typo in the documentation of multicol(.dtx): l.533-537 % \subsection{Tracing the output} % % To understand the reasoning behind the decisions \TeX{} makes when % processing a \mc{} environment, a tracing mechanism is provided. % If you set the counter `\mc{}' to a positive \meta{number} you then l.160 % \newcommand{\mc}{{\sf multicols}} but obviously the counter should be tracingmulticols. Ulrich Dirr