%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 08-02-1 auf Seite 112.
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%%  Copyright (C) 2016 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[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
%StartShownPreambleCommands
\usepackage{pstricks}
\makeatletter  % C4=196 and  C5=197
\newpsfontdot{CirclePlus}[2 0.0 0.0 2 -0.78 -0.7]{Symbol}{<C5>}
\newpsfontdot{CircleMultiply}[2 0.0 0.0 2 -0.78 -0.7]{Symbol}{<C4>}
\@namedef{psas@cm}{\psk@dotsize \psds@CircleMultiply 0 0 Dot}
\@namedef{psas@cp}{\psk@dotsize \@nameuse{psds@CirclePlus} 0 0 Dot}
\makeatother
%StopShownPreambleCommands
\begin{document}
\psline[arrowscale=2]{cm-cm}(0,0.5)(2,0.5)
\psline[arrowscale=4,linecolor=red]{cm-cp}(3,0.5)(5,0.5)
  \psline[arrowscale=3,linecolor=blue]{cm->}(6,0.5)(8,0.5)
\end{document}