Beamer 中的页面链接

documentclass[]{beamer}
usetheme{Madrid}

usenavigationsymbolstemplate{}

	itle{Main Title} 
author{Jane Doe}
institute{University A}
date{	oday}

egin{document}

egin{frame}
	itlepage % Print the title page as the first slide
end{frame}

egin{frame}
frametitle{First Page}
egin{exampleblock}{Example}
This is an example which will be used later.
end{exampleblock}
end{frame}

egin{frame}
frametitle{Second Page}
label{important}
egin{itemize}
item Item 1
item Item 2
end{itemize}
end{frame}

egin{frame}
frametitle{Third Page}
egin{itemize}
item In this slide, we are going to use the sample example on slide~
ef{important}.
end{itemize}
end{frame}

end{document}