\mode<presentation>

\defbeamertemplate{itemize item}{circ}%
{\small\raise.2ex\hbox{$\bullet$}}

\defbeamertemplate{itemize subitem}{circ}%
{\small\raise.1ex\hbox{$\circ$}}

\defbeamertemplate{itemize subsubitem}{circ}%
{\scriptsize\raise.1ex\hbox{$\bullet$}}

\setbeamertemplate{items}[circ]

\setbeamertemplate{frametitle}
{
  \nointerlineskip%
  \vspace{4mm}\hspace{-8mm}
  \begin{beamercolorbox}[wd=0.8\paperwidth]{frametitle}
    \usebeamerfont{frametitle}{\insertframetitle}\par
    \usebeamerfont{framesubtitle}{\usebeamercolor{framesubtitle}\insertframesubtitle}
  \end{beamercolorbox}
}

\mode<all>