[Tex/LaTex] No indent in res.cls

Question

I am writing a resume using res.cls.
I would like to write a non-indented paragraph under a section heading but can't figure out how to override the heavily indented margins used for columns under sections. I have tried \flushleft and a few other things but that nothing has worked. Anyone have any suggestions?

A minimal working example illustrating the undesired indentation:

\documentclass{res}
\usepackage{lipsum}% just to generate text for the example

\begin{document}

\section{Test Section}
\lipsum[4]

\end{document}

Answer 1

As Alan Munn suggests in his comment, you should consider using another document class (res.cls is very old, and poorly documented). That being said, according to the comments on res.cls, you can solve your problem using the \newsectionwidth{<length>} command which controls the amount that the section titles go in the left margin; a little example:

\documentclass{res}
\usepackage{lipsum}% just to generate text for the example

\newsectionwidth{0cm}

\begin{document}

\section{Test Section One One}
\lipsum[4]

\end{document}

The above solution moves the section title to the right; now that I reread the question, perhaps the desired effect is to leave the title as it is and move the block of text to the left; if this is the case, \parshape will do the job:

\documentclass{res}
\usepackage{lipsum}% just to generate text for the example

\begin{document}

\section{Test Section One}
\lipsum[4]

\section{Test Section Two}
\parshape 1 -\sectionwidth \resumewidth
\lipsum[4]

\section{Test Section Three}
\lipsum[4]

\end{document}