%%
%% The LaTeX Companion, 3ed
%%
%% Example A-4-5 on page II-680 in "Hooks provided for \protect \nxLcs {shipout} operations".
%%
%% 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{106.20108pt}
%--------------------------------------
% For the book example we have to do some special paper dimensions here.
\setlength\textheight{106pt}
\usepackage[%
textheight=\textheight,
paperheight=\dimexpr\textheight+4pt,
textwidth=\textwidth,
paperwidth=\dimexpr\textwidth+2pt,
]
{geometry}
% So the above should not be copied into your own document preamble.
%--------------------------------------
\usepackage{microtype} % improve justification in small columns
%StartShownPreambleCommands
\usepackage{kantlipsum,graphicx,color}
\AddToHook{shipout/background}
{\put(.5\paperwidth,-.5\paperheight)
{\makebox(0,0){\includegraphics
[scale=.7]{latex-logo}}}}
%StopShownPreambleCommands
\begin{document}
\kant[1][1-2] % text by the author ...
\AddToHookNext{shipout/foreground}
{\put(0,-\paperheight)
{\colorbox{red}{Censor this!}}}
\kant[1][3] % ... more text ...
\end{document}
