%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-6-17 on page I-721 in "Ligature 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{111.0pt}

  %!TEX program = lualatex

  \setlength\parindent{0pt}

%StartShownPreambleCommands
\usepackage{fontspec}
%StopShownPreambleCommands

\begin{document}
\fontspec{Libertinus Serif}     ch ck Th tt tz st ct sp      \\
\addfontfeature{Ligatures=Rare} ch ck Th tt tz \hfill (rare) \\
\addfontfeature{Ligatures=Historic}st ct (not sp)\hfill (historic)
\par \medskip
\fontspec{BaskervilleF}              st ct sp Qu             \\
\addfontfeature{Ligatures=Rare}      st ct sp \hfill (rare)  \\
\addfontfeature{Ligatures=Historic}  Qu   \hfill (historic)
\end{document}