
\documentclass[twocolumn]{article}
\usepackage[paperwidth=21cm,paperheight=15cm,margin=1.1cm]{geometry}
\usepackage{zebra}
\zebrasetup{symbol/comment=$\clubsuit$}
\pagestyle{empty}
\begin{document}
\section{Demo name\comment{revise the name}}
This draft still needs work
\todo[alice]{\label{zebra:intro}revise the introduction}. The
opening paragraph should also explain the main goal more plainly.
Add one more citation here \note[bob]{support this claim}. A
brief roadmap sentence would also make the structure easier to
scan.

The issue raised in Todo~\ref{zebra:intro} still applies in
the conclusion. The table now looks fine
\fixed[carol]{alignment corrected}, but one figure is still
missing \placeholder[eve]{insert the overview figure}. A short
transition would also help the flow. The middle section should
probably end with a clearer summary sentence before the
discussion begins. That summary can stay compact, but it should
signal why the next section matters.

Please verify the totals \note[frank]{check the numbers} and
confirm the wording in the last paragraph
\comment[tom]{is this sentence too strong?}. A small typo has
already been fixed \fixed[heidi]{typo corrected}. The ending
should stay short. The final sentence should return to the main
claim rather than repeat background material. You can place
\todo[judy]{summarise the findings} anywhere once the narrative
is stable.

One more short paragraph is enough to show how \placeholder{wow,
so great!} the markers stay readable in a compact two-column layout.
The example is intentionally small, but it should still look like
a realistic revision pass.\comment{Bye}
\end{document}
