%%
%% The LaTeX Companion, 3ed
%%
%% Example 6-9-4 on page I-501 in "Scattering table data across your document".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}

%StartShownPreambleCommands
\usepackage{keyvaltable}
\NewKeyValTable[norowbg]{ToDo}{ prio: default=high;
                                text: head=comment }
\NewCollectedTable{notes}{ToDo}
\newcommand\note[2][]{\CollectRow[#1]{notes}{text=#2}}
%StopShownPreambleCommands

\begin{document}
\note{{A note, with comma}}
\note{one more with prio change, prio=low}
My notes: \ShowCollectedTable{notes} And more text.
\note[bg=blue!10]{and some afterthought}
\end{document}