%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example A-1-16 on page 857.
%%
%% 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

\StopShownPreambleCommands
\begin{document}
The \vspace{3mm}use of a \verb!\vspace! command
inside a paragraph is considered somewhat odd.
It could perhaps be used with a negative space
value to get rid of redundant space.

\vspace{\baselineskip}

Between paragraphs, adjusting the spacing is
somewhat more useful, and it allows control
of the white space before and after displayed
material.
\end{document}