%%
%% The LaTeX Companion, 3ed
%%
%% Example A-3-2 on page II-661 in "LR boxes".
%%
%% 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{207.0pt}
%StartShownPreambleCommands

%StopShownPreambleCommands

\begin{document}
\fbox{Boxed Text} \hfill
\setlength\fboxrule{2pt}%
{\setlength\fboxsep{2mm}\fbox{Boxed Text}}
\hfill \fbox{Boxed Text}
\end{document}