# svjour3: h/v centering text on a4paper?

I am preparing a manuscript using svjour3. I would like to have the text (dimensions unchanged!) simply centred on a4paper rather than aligned to the top-right corner, given that svjour3 in all but twocolumn mode assumes some a5'ish page geometry.

I am using an excerpt from ftp://ftp.springer.de/pub/tex/latex/svjour3/global/template.tex.

\RequirePackage{fix-cm}
\documentclass[smallextended]{svjour3}%ftp://ftp.springer.de/pub/tex/latex/svjour3/global/svjour3.cls
\smartqed
\usepackage{blindtext}
\begin{document}
\author{First Author}
\institute{F. Author \at
Tel.: +123-45-678910\\
Fax: +123-45-678910\\
\email{fauthor@example.com}}
\maketitle
\begin{abstract}
\blindtext
\keywords{First keyword \and Second keyword \and More}
\end{abstract}
\section{Introduction}
\blindtext
\section{Section title}
\blindtext
\end{document}


I am aware of a previous question, but I don't want the margins to be simply balanced, I want the text dimensions to remain unchanged and have the text body centred as-is on a4.

I am also aware that this will be fixed for me in final editing, but I want to have it centred for my private purposes.

Set the parameters \oddsidemargin, \evensidemargin and \topmargin to the suitable values. It just requires some arithmetic and taking into account that there is a “fixed origin” one inch down and one inch right the paper.

\RequirePackage{fix-cm}
\documentclass[smallextended,a4paper]{svjour3}
\usepackage{blindtext}

\smartqed

\AtBeginDocument{%
\setlength{\oddsidemargin}{\dimexpr(\paperwidth-\textwidth)/2-1in}%
\setlength{\evensidemargin}{\oddsidemargin}%
\setlength{\topmargin}{%
}

\begin{document}

\author{First Author}
\institute{F. Author \at
Tel.: +123-45-678910\\
Fax: +123-45-678910\\
\email{fauthor@example.com}}
\maketitle
\begin{abstract}
\blindtext
\keywords{First keyword \and Second keyword \and More}
\end{abstract}
\section{Introduction}
\blindtext
\section{Section title}
\blindtext\blindtext
\blindtext\blindtext

\end{document}


The header is not taken into account, so the text block is centered.