[Tex/LaTex] How to add todo notes

Question

Is there a simple way to add todo notes to LaTeX documents ?

I would like to have these notes in red in the generated pdf and a simple syntax to write them.

Answer 1

There is a todonotes package that makes adding notes easy enough. They appear in the margins by default.

A simpler version, if you just want red text in the body of the text as notes is just to define a command \myworries that makes its argument red.

\documentclass{article}
\usepackage{xcolor}
\newcommand\myworries[1]{\textcolor{red}{#1}}
\begin{document}
Here is some text.
\myworries{But I'm worried about the text}
\end{document}

And then if you want to hide the comments, just add the line \renewcommand\myworries[1]{} below the \newcommand. This will hide all your notes.

A third option is to use LaTeX's own \marginpar command to put a paragraph in the margin. It's not great, but for little notes to yourself it's adequate.

Alan Munn, in the comments, has made me aware of another package todo that seems to be simpler than todonotes but a little more powerful than \marginpar. Though I've not used it so I don't know for sure.