This article is tried to explain how to use beamer for your presentation. Make it easy to use and more productive. The idea came from a  website of Rouben Rostamian and Beamer manual.

The samples are from beamer manual generating by:
\documentclass{beamer}
\usetheme{@THEME}  % name of theme changed here
\begin{document}
\title{There is No Largest Prime Number}
\subtitle{With an introduction to a new proof technique}
\author{Euklid of Alexandria}
\institute[UA]{Department of Mathematics \ University of Alexandria}
\date{\today}

\begin{frame}[plain]
  \titlepage
\end{frame}

\begin{frame}
    \frametitle{There is No Largest Prime Number}
    \framesubtitle{The proof uses \textit{reductio ad absurdum}.}
    \begin{theorem}
       There is no largest prime number.
    \end{theorem}
    \begin{proof}
        \begin{enumerate}
        \item<1-| alert@1> Suppose $p$ were the largest prime number.
        \item<2-> Let $q$ be the product of the first $p$ numbers.
        \item<3-> Then $q+1$ is not divisible by any of them.
        \item<1-> Thus $q+1$ is also prime and greater than $p$.\qedhere
        \end{enumerate}
    \end{proof}
\end{frame}
\end{document}

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