Beamer background

Question

I need a background only for one slide, I need include a picture, like a background, in a unique slide. The background is on all slides but I need a picture in only one slide like a bacgkround. I am using madrid theme. Thanks for any help.

Answer 1

If you want to change the background image for a group (1 or more) of slides, then before that group, set

% image from https://tranhtreophongkhachdep.com/200-mau-tranh-phong-canh-dep-nui-rung-tay-bac/
\setbeamertemplate{background}{
\tikz\node[opacity=.5,yscale=1.5,inner sep=0]{\includegraphics[width=\paperwidth]{luavang}};}

(let play with some options of the \includegraphics command, e.g., [width=\paperwidth] and/or some options of the TikZ,'s \node command, e.g., [opacity=.5,yscale=1.5], [inner sep=0] to get desired background) and then set

\setbeamertemplate{background}{}

after that group of slides to back to the usual background.

Full example code: link on overleaf

\documentclass{beamer}
\usepackage{tikz}
\usetheme{madrid}
\title{Beamer Template}
\author{TeXstudio Team}
\begin{document}
\begin{frame}[plain]
\maketitle
\end{frame}

\begin{frame}{Usual background}
\end{frame}

% image from https://tranhtreophongkhachdep.com/200-mau-tranh-phong-canh-dep-nui-rung-tay-bac/

\setbeamertemplate{background}{
\tikz\node[opacity=.5,yscale=1.5,inner sep=0]{\includegraphics[width=\paperwidth]{luavang}};}
\begin{frame}{A specific background}
\end{frame}
\setbeamertemplate{background}{}

\begin{frame}{Usual background again}
\end{frame}

\end{document}

PS: As said in Make a slide background optional in Beamer, you can put that group of slides inside a local group {...} to locally change the background (and other things if you want).

\documentclass{beamer}
\usepackage{tikz}
\usetheme{madrid}
\title{Beamer Template}
\author{TeXstudio Team}
\begin{document}
\begin{frame}[plain]
\maketitle
\end{frame}

\begin{frame}{Usual background}
\end{frame}

{% scope to starting a new background
% image from https://tranhtreophongkhachdep.com/200-mau-tranh-phong-canh-dep-nui-rung-tay-bac/
\setbeamertemplate{background}{
\tikz\node[opacity=.5,yscale=1.5,inner sep=0]   {\includegraphics[width=\paperwidth]{luavang}};}
\begin{frame}{A specific background}
\end{frame}
}% end of the scope of the new background

\begin{frame}{Usual background again}
\end{frame}

\end{document}