%%
%% The LaTeX Companion, 3ed
%%
%% Example 1-3-1 on page I-16 in "Typographic conventions".
%%
%% 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{ragged2e}
%StopShownPreambleCommands

\begin{document}
The right column shows the input text to be treated
by \LaTeX{} with preamble material shown in blue.
In the left column one sees the result after
typesetting.
\end{document}