%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-3-10 on page I-669 in "Combining standard font 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{159.0pt}

%StartShownPreambleCommands
\usepackage[sfdefault]{roboto}
%StopShownPreambleCommands

\begin{document}
First regular width:\\ ``A \textbf{Roboto} line with
{\fontseries{l}\selectfont light} text.''

\bigskip\fontseries{c}\selectfont
Condensed width for comparison:\\ ``A \textbf{Roboto}
line with {\fontseries{l}\selectfont light} text.''
\end{document}