%%
%% The LaTeX Companion, 3ed
%%
%% Example 3-6-18 on page I-249 in "Providing your own editorial commands".
%%
%% 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{99.0pt}

  \setlength\parindent{0pt}
  \setlength\textheight{10\baselineskip}

  \tolerance=3000

%StartShownPreambleCommands
\usepackage[commentmarkup=footnote]{changes}
\definechangesauthor[name=Anonymous]{??}
\definechangesauthor[name=Frank,color=red]{FMi}
\DeclareDocumentCommand\add{O{??}mo}
  {\IfValueTF{#3}{\added[id=#1,comment=#3]{#2}}{\added[id=#1]{#2}}}
\DeclareDocumentCommand\del{O{??}mo}
  {\IfValueTF{#3}{\deleted[id=#1,comment=#3]{#2}}
  {\deleted[id=#1]{#2}}}
\DeclareDocumentCommand\rep{O{??}mmo}
  {\IfValueTF{#4}{\replaced[id=#1,comment=#4]{#2}{#3}}
                 {\replaced[id=#1]{#2}{#3}}}
%StopShownPreambleCommands

\begin{document}
Sample text, something \add{added}[better], a \rep[FMi]{word}{blob}
replaced and \del[FMi]{some}[Really?] stuff removed.
\end{document}