Several formal Z paragraphs can be typeset side-by-side. This is generally useful only for narrow paragraphs, though it is possible to make paragraphs be narrower, as explained here.
The troff mark-up for side-by-side typesetting uses .ZA (alongside) and .ZB (below) directives, each on a line by itself.
First paragraph .ZA Next paragraph ... .ZB
There is a choice of LATEX mark-up for side-by-side typesetting determined by which style file is used. With cadiZ.sty, the mark-up is as follows.
First paragraph \ZA Next paragraph ... \ZB
With ltcadiz.sty, the mark-up is as follows.
\begin{sidebyside} First paragraph \nextside Next paragraph ... \end{sidebyside}
The number of paragraphs to be typeset side-by-side, if more than two, should be given as an optional parameter to the begin request.
\begin{sidebyside}[3]