# TabularX vertical alignment

Since the enumiten Package (and therefore leftmargin=*) doesnt work in custom environments, I was trying to trick a bit, doing the items in a table like this (don't ask..) :

  \documentclass[fleqn,10pt,twocolumn]{article} % Document font size and equations
\usepackage{tabularx}
\renewcommand\tabularxcolumn[1]{m{#1}}
\newcommand{\localtextbulletone}{{\raisebox{.45ex}{\rule{.6ex}{.6ex}}}}

\newenvironment{parameters}
{Parameters:\\
\tabularx{\linewidth}{>{\raggedright\arraybackslash}p{0.3cm}X@{}}    }
{\endtabularx}

\newcommand{\parameter}[2] %Name, Description
{\localtextbulletone & #1: #2\\}

\begin{document}
\begin{parameters}
\parameter{Test}{This is a long text to illustrate the alignment of the item...
blablabla long text long text long text long text long text long text long text long
text long text long text}
\end{parameters}

\end{document}


I needed to set the tabularxcolumn to 'm' instead of 'p' for other tables in my document. In this case I would like to set it back to p, but only in this particular environment so the bullets are top aligned and not centered.

If I try to just do the analoge \renewcommand\tabularxcolumn[1]{p{#1}}inside the environment, latex is not happy. How can I reset the tabularxcolumn just for this environment?

Just put the \renewcommand line immediately before the \tabularx it will be scoped by the surrounding parameters element.
 \newenvironment{parameters}