\documentclass{article}
\usepackage{fancybox}
\usepackage{hyperref}
\newenvironment{slide}[0]{}{\vfill\eject}
\begin{document}
%\thisfancyput(8.5cm,-11cm){\setlength{\unitlength}{1.cm}\fancyoval(17,25.5)}
\begin{slide}
\thisfancyput(8.5cm,-11cm){\setlength{\unitlength}{1.cm}\fancyoval(17,25.5)}
The first page.
\end{slide}
%\hypersetup{pdfpagetransition=Dissolve}
\begin{slide}
\hypersetup{pdfpagetransition=Dissolve}
  And the second one.
\end{slide}
\end{document}