[OS X TeX] Borderless (or almost borderless) printing

[Margarida Mello]

Hi,
regarding the suggestion and related question by Alan Munn, I infer  
that tikz adds some kind of padding  to the picture, which, albeit  
small, causes an overflow. Hence the picture is  rendered in the  
second page, leaving the first page blank. This can be eliminated by  
adding a bounding box command. The code would read

\documentclass[letter]{article}
\usepackage[margin=0in]{geometry}
\usepackage{tikz}
\pagestyle{empty}
\begin{document}
\noindent\begin{tikzpicture}[x=1in,y=1in]
%
\useasboundingbox (0,0) rectangle (8.5,11);
%
\draw (0,0) -- (8.5,11);
\draw (0,11) -- (8.5,0);
\draw (4.25,0) -- (4.25,11);
\draw (0,5.5) -- (8.5,5.5);
\end{tikzpicture}

\end{document}

Regards,
Margarida P. Mello