%% 
%%  A DANTE-Edition example
%% 
%%  Example 08-01-10 on page 96.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  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.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks}

\begin{document}
\begin{pspicture}[showgrid](3,3)
  \psline{{->}}(1,2.75)
  \psline[arrows=-),arrowscale=2](2,2.75)
  \psline[arrows={-]},arrowscale=2 3](2.75,2.75)
  \psline[arrows=->,arrowscale=3 5](2.75,2.25)
  \psline[arrows=->,arrowscale=5 3](2.75,1.75)
  \psline[arrows=-o,arrowscale=3](2.75,1)
\end{pspicture}
\end{document}