Example of poster in landscape orientation prepared by using beamerposter package.
This template was originally published on ShareLaTeX and subsequently moved to Overleaf in December 2019.
\documentclass[final,unknownkeysallowed]{beamer}
\mode<presentation>
{
% you can chose your theme here:
% \usetheme{Aachen}
\usetheme{I6dv}
% \usetheme{I6pd}
% \usetheme{Berlin}
% \usetheme{I6pd2}
% \usetheme{I6td}
% \usetheme{Oldi6}
}
\graphicspath{{figures/}}
\usepackage{times}
\usepackage{amsmath,amssymb}
\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage[orientation=landscape,size=custom,width=200,height=120,scale=2,debug]{beamerposter} % e.g. custom size poster
\title[Fancy Posters]{Making Really Fancy Posters with \LaTeX}
\author[Dreuw \& Deselaers]{Philippe Dreuw and Thomas Deselaers}
\institute[RWTH Aachen University]{Human Language Technology and Pattern Recognition,RWTH Aachen University}
\date{Jul. 31th, 2007}
\begin{document}
\begin{frame}{}
\vfill
\begin{block}{\large Fontsizes}
\centering
{\tiny tiny}\par
{\scriptsize scriptsize}\par
{\footnotesize footnotesize}\par
{\normalsize normalsize}\par
{\large large}\par
{\Large Large}\par
{\LARGE LARGE}\par
{\veryHuge veryHuge}\par
{\VeryHuge VeryHuge}\par
{\VERYHuge VERYHuge}\par
\end{block}
\vfill
\begin{columns}[t]
\begin{column}{.48\linewidth}
\begin{block}{Introduction}
\begin{itemize}
\item some items
\item some items
\item some items
\item some items
\end{itemize}
\end{block}
\end{column}
\begin{column}{.48\linewidth}
\begin{block}{Introduction}
\begin{itemize}
\item some items and $\alpha=\gamma, \sum_{i}$
\item some items
\item some items
\item some items
\end{itemize}
$$\alpha=\gamma, \sum_{i}$$
\end{block}
\begin{block}{Introduction}
\begin{itemize}
\item some items
\item some items
\item some items
\item some items
\end{itemize}
\end{block}
\begin{block}{Introduction}
\begin{itemize}
\item some items and $\alpha=\gamma, \sum_{i}$
\item some items
\item some items
\item some items
\end{itemize}
$$\alpha=\gamma, \sum_{i}$$
\end{block}
\end{column}
\end{columns}
\end{frame}
\end{document}
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