\mode<presentation>

% fonts

\setbeamerfont{structure}{family=\rmfamily,series=\bfseries}

\setbeamerfont{title}{size=\Huge,parent=structure}
\setbeamerfont{subtitle}{size=\Large,parent=title}

\setbeamerfont{section in toc}{size=\Large,parent=structure}
\setbeamerfont{section in head/foot}{size=\tiny,parent=structure}
\setbeamerfont{subsection in toc}{size=\large,parent={section in toc}}

\setbeamerfont{frametitle}{parent=structure,size=\Large}
\setbeamerfont{framesubtitle}{parent=frametitle,size=\large}

\setbeamerfont{caption}{size=\footnotesize}

\setbeamerfont{block title}{size=\normalsize,series=\mdseries,parent={structure,block body}}

\setbeamerfont{item}{parent=structure,series=\mdseries}

\mode
<all>