Using the following code, to justify item text, how can I prevent the indentation before the item text, and hide the bullets.
I tried \hspace {-.2cm} and \item[] but both did not work.
\documentclass{beamer}
\usepackage{ragged2e}
\usepackage{lipsum}
\let\olditem\item
\renewcommand\item{\olditem\justifying}
\begin{document}
\begin{frame}
\begin{itemize}
\item \lipsum[1-1]
\end{itemize}
\end{frame}
\end{document}

\justifyingwhich is the default for tex anyway. If you don't want bullets or indent why use the itemize environment? why not just\begin{frame}\ipsum[1]\end{frame}?? – David Carlisle Oct 04 '18 at 19:25\item[]would not work as you have defined it to be\olditem\justifying[]so\olditemwon't see the[]– David Carlisle Oct 04 '18 at 19:31\item[](without the\justifyingredefinition that stops[]and beamers<>options.) but I can't really guess what layout you intend with an itemized list with only some items bulleted. Hopefully samcarter's answer covers it anyway:-) – David Carlisle Oct 04 '18 at 20:08