% Free sample Beamer slide deck from 99helpers.com/file-types/tex
% Build it with:  pdflatex sample-slides.tex  (twice, for the navigation)

% 1. Beamer is a document class: each frame becomes one PDF page (a slide).
\documentclass[aspectratio=169]{beamer}
\usetheme{Madrid}          % a built-in theme: colours, headers, footer
\usepackage{booktabs}

\title{A Sample Beamer Deck}
\subtitle{Free sample from 99helpers.com/file-types/tex}
\author{Ada Example}
\date{27 October 2026}
\hypersetup{pdfsubject={Free sample Beamer file from 99helpers.com/file-types/tex}}

\begin{document}

% 2. The title slide, built from \title, \author and \date above.
\begin{frame}
  \titlepage
\end{frame}

% 3. A slide with a list. <2-> means: show from the second step on,
%    so this one frame produces several PDF pages, one per step.
\begin{frame}{Why slides in \LaTeX?}
  \begin{itemize}
    \item Plain-text source that works with version control
    \item<2-> Mathematics typeset as well as in a paper:
      \[ \hat{f}(\xi) = \int_{-\infty}^{\infty} f(x)\, e^{-2\pi i x \xi}\, dx \]
    \item<3-> The output is a PDF that opens anywhere
  \end{itemize}
\end{frame}

% 4. Two columns, with a table and a block.
\begin{frame}{Columns, tables and blocks}
  \begin{columns}[T]
    \begin{column}{0.48\textwidth}
      \begin{tabular}{@{}ll@{}}
        \toprule
        Class   & Output \\
        \midrule
        article & Papers \\
        book    & Books \\
        beamer  & Slides \\
        \bottomrule
      \end{tabular}
    \end{column}
    \begin{column}{0.48\textwidth}
      \begin{block}{Tip}
        Build twice: Beamer, like \LaTeX{}, writes navigation data to
        auxiliary files on the first run.
      \end{block}
    \end{column}
  \end{columns}
\end{frame}

\end{document}