%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-6-22 on page I-724 in "Stylistic features".
%%
%% 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{87.0pt}
%!TEX program = lualatex
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{fontspec} \setmainfont{Libertinus Serif}
%StopShownPreambleCommands
\begin{document}
Ä Ü Ö \quad {\addfontfeature{StylisticSet=1}Ä Ü Ö} \\
J K R \quad {\addfontfeature{StylisticSet=2}J K R} \\
Gruß \textsc{Gruß} GRU\SS \\
{\addfontfeature{StylisticSet=3}Gruß \textsc{Gruß} GRU\SS} \\
{\addfontfeature{StylisticSet=4}Gruß \textsc{Gruß} GRU\SS} \\
W \quad {\addfontfeature{StylisticSet=5}W} \qquad
\& \quad {\addfontfeature{StylisticSet=6}\&} \\
JKQRW hy ß \& \\ {\addfontfeature{Style=Alternate}JKQRW hy ß \&} \\
{\addfontfeature{StylisticSet={1,2,4,5,6}}JKQRW hy ß \&}
\end{document}
