%% 
%%  A DANTE-Edition example
%% 
%%  Example 17-03-6 on page 282.
%% 
%%  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{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-tree}

\begin{document}
\Huge
\pstree[treesep=0.3cm,
    radius=3pt]{\Tc{3pt}}{%
  \TC~{X}
  \TC~{x}
  \TC~{\_}
  \TC~{\tiny a}
  \TC~{g}
}
\end{document}