답변1
\documentclass{beamer}
\usetheme{moloch}% modern fork of the metropolis theme
\setbeamertemplate{itemize item}{$\bullet$}
\setbeamertemplate{itemize subitem}{$\circ$}
\setbeamertemplate{itemize subsubitem}{--}
\begin{document}
\begin{frame}
\begin{itemize}
\item test
\begin{itemize}
\item test
\begin{itemize}
\item test
\end{itemize}
\end{itemize}
\end{itemize}
\end{frame}
\end{document}