

\setbeamerfont{pagenumber footline}{size=\large,series=\bfseries}
\setbeamerfont{frametitle}{size=\Large,series=\bfseries}
\setbeamerfont{framesubtitle}{size=\small,shape=\itshape,series=\bfseries}

\setbeamerfont{title}{size=\Large,series=\bfseries}
\setbeamerfont{subtitle}{size=\small,series=\bfseries}