I'm changing the numbering scheme for some (but not all) enumerate lists while using beamer (with Warsaw), using \begin{enumerate}[a]. While this works in principle, the new "numbers" a, b, c, ... get printed without bullet style, as plain (blue) text. Is there a way to preserve the bullet style you get for the default enumerate?
Edit: Added minimal working example below.
\documentclass{beamer}
\usetheme{Warsaw}
\begin{document}
\begin{frame}
Default has bullets (in beamer/Warsaw):
\begin{enumerate}
\item Some item
\item another item
\end{enumerate}
But alphabetical numbering via enumerate parameter looks ugly:
\begin{enumerate}[a]
\item Some item
\item another item
\end{enumerate}
\end{frame}
\end{document}
produces

\renewcommand{\theenumi}{\textbullet\alph{enumi}}. Please add some working Code (See M(inimal)W(orking)E(xample)). – Bobyandbob Jul 28 '17 at 03:41\renewcommand{\theenumii}{\alph{enumii}}(since it was for a sublist) and\begin{enumerate}. – Henning Koehler Jul 28 '17 at 03:55