[Tex/LaTex] Standard margin in documentclass article

articlemargins

I want to increase the (right) margin in the documentclass article about 0.5cm. How could I achieve this? I can use the package geometry but for that I must know the standard margin of this class.

Best Answer

\documentclass{article}
\usepackage{lipsum}
%\textwidth=\dimexpr\textwidth-.5cm\relax%  BRUTE syntax
%\advance\textwidth by -0.5cm%              TeX'ey syntax
\addtolength{\textwidth}{-0.5cm}%           LaTeX'ey syntax
\begin{document}
\lipsum[1]
\end{document}

Syntax EDITED to reflect LaTeX (rather than BRUTE syntax), per suggestion of egreg.

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