\documentstyle[%
%tracefnt,%
dingbat,%
%varsym,%
color,punk,changebar,array,epsfig]{article}
% an experiment in scaling up a font
\makeatletter
\declare@font[1.5]{bigzapf}{m}{n}{pzcmi}
\makeatother
%\tracingfonts3
\driver{dvips}
\typeout{Using \rmdefault\space as rmdefault}
\typeout{Using \sldefault\space as sldefault}
\typeout{Using \ttdefault\space as ttdefault}
\typeout{Using \sfdefault\space as sfdefault}
\extrarowheight=5pt
\newenvironment{Slide}[1]{%
\clearpage\centerline{{\LARGE\bf\background{\yellow}{#1}}}}{}
\begin{document}
\input tests
\end{document}