example.tex

\documentclass[final, hyperref={pdfpagelabels=false}]{beamer}
\mode<presentation>
\usetheme{UCLA}
\setbeamertemplate{caption}[numbered]

\usepackage{amsmath, amsthm, amssymb, latexsym}
\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage[%
  orientation=landscape,
  size=custom,
  width=160,  % cm
  height=100,  % cm
  scale=1.5,
  debug]{beamerposter}
\usepackage{lipsum}

\usepackage[sfdefault, scale=1.05]{FiraSans}
\usepackage[scale=1.05]{FiraMono}
\usepackage[T1]{fontenc}
\DeclareRobustCommand\ebseries{\fontseries{eb}\selectfont}  % extrabold
\DeclareRobustCommand\ltseries{\fontseries{l}\selectfont}  % light
\DeclareRobustCommand\sbseries{\fontseries{sb}\selectfont}  % semibold
% use semibold for \bfseries
\renewcommand{\textbf}[1]{{\fontseries{sb}\selectfont#1}}
\DeclareRobustCommand\bfseries{\fontseries{sb}\selectfont}

% use sans serif math
\usepackage[cmintegrals]{newtxsf}
% make ASCII characters in math mode the same as in normal mode
\usepackage[basic, italic, defaultimath, nohbar, defaultmathsizes]{mathastext}

\title[Fancy Posters]{Making Really Fancy Posters with \LaTeX}
\author{author name}
\institute[UCLA AOS]{Department of XXX, UCLA}
\date{Nov 20, 2018}

\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 \alert{some items}
        \end{itemize}

        \lipsum[1]
    \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}
        $$\alpha=\gamma \sum_{i} x_i$$
    \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 $\alpha=\gamma \sum_{i} x_i$
        \item some items
        \item some items
        \item some items
        \end{itemize}
        $$\alpha=\gamma \sum_{i} x_i $$
    \end{block}
    \end{column}
\end{columns}
\end{frame}
\end{document}