%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 2-2-9 on page 31.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.0pt}
\StartShownPreambleCommands
\makeatletter
\newcommand\Csub{\@startsection{subsection}{2}%
 {0pt}{-\baselineskip}{.2\baselineskip}%
 {\centering\itshape}}
\newcommand\Lsub{\@startsection{subsection}{2}%
 {0pt}{-\baselineskip}{.2\baselineskip}%
 {\raggedright\sffamily}}
\newcommand\Rsub{\@startsection{subsection}{2}%
 {0pt}{-\baselineskip}{.2\baselineskip}%
 {\raggedleft\MakeUppercase}}
\newcommand\Hsub{\@startsection{subsection}{2}%
 {0pt}{-\baselineskip}{.2\baselineskip}%
 {\hrule\medskip\itshape}}
\makeatother
\StopShownPreambleCommands
\begin{document}
\section{A very long heading that shows
         the default behavior of \LaTeX's
         sectioning commands}
\Csub{A subsection heading}
The heading is centered using an italic font.
\Lsub{A subsection heading}
The heading is left-justified using a sans
serif font.
\Rsub{A subsection heading}
The heading is right-justified and uses
uppercase letters.
\Hsub{A subsection heading}
This heading has a horizontal rule above
the text.
\end{document}