%%
%% The LaTeX Companion, 3ed
%%
%% Example 6-6-8 on page I-474 in "bigstrut --- Spreading individual table lines apart".
%%
%% 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}

%StartShownPreambleCommands
\usepackage{bigstrut}
%StopShownPreambleCommands

\begin{document}
\begin{tabular}{|ccc|}                                      \hline
              A & B & C \\ \hline              x & y & z \\ \hline
\end{tabular}

\bigskip

\begin{tabular}{|ccc|}                                      \hline
 \bigstrut[t] A & B & C \\ \hline \bigstrut[b] x & y & z \\ \hline
\end{tabular}
\end{document}