\documentclass{article}
\usepackage{times}
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\notesname{Notes:}
\begin{document}

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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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\color{red} Overlay file: \makeatletter\@overlay\makeatother
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This is  Slide No. \theslide.\\
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This is  Slide No. \theslide.\\
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\begin{slide}\Huge\color{orange}\centering
This is  Slide No. \theslide.\\
\color{blue}\large Slide overlay No. \theslideoverlay.\\
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\end{slide}


\end{document}
