[Tex/LaTex] Put a beamer background image in the right bottom corner

backgroundsbeamergraphicstikz-pgf

In beamer, I like to place a background image in all my slides. So I could use this:

\usebackgroundtemplate{
\tikz[overlay,remember picture] \node[opacity=0.3, at=(current page.center)] {
   \includegraphics[height=\paperheight,width=\paperwidth]{background.png}};
}

However, to put the background image at the right-bottom corner, what should I do? I guess I should change some how "current page.center" to something like "current page.south east". But, I want to match the right-bottom corner of the image file with the right-bottom corner of the slides.

Best Answer

Add anchor=south east together with at=(current page.south east). Moreover, you'd probably also want to set inner sep=0 to avoid unnecessary white spaces.

MWE

\documentclass{beamer}
\usepackage{tikz}
\usepackage{mwe} % provides example image

\usebackgroundtemplate{
  \tikz[overlay,remember picture] 
  \node[opacity=0.3, at=(current page.south east),anchor=south east,inner sep=0pt] {
    \includegraphics[height=\paperheight,width=\paperwidth]{image}};
}

\begin{document}
\frame{frame content}
\end{document}

Output

enter image description here

Related Solutions

[Tex/LaTex] Tikz fade with transparency so background is visible in beamer

You need to set up a fading via \tikzfading and then use the fade path option to the fill command:

Sample output

\documentclass{beamer}
\usepackage{tikz}
\usepackage{graphicx}
\usetikzlibrary{shapes.arrows, fadings}

\setbeamertemplate{background canvas}{\includegraphics[width=\paperwidth]{example-image-a.jpg}}

\tikzfading[name=fade right,
  left color=transparent!0, right color=transparent!100]

\begin{document}
\begin{frame}
  \tikz{\fill[red,path fading=fade right] (0,0) rectangle (\linewidth,1.5em);}
\end{frame}
\end{document}

See the section "Creating Fadings" (currently 23.4.1) of the pgfmanual.

[Tex/LaTex] How to set a background image on a custom background color in beamer

\documentclass[t]{beamer}

\setbeamerfont{frametitle}{size=\fontsize{24}{28},series=\bfseries}
\setbeamercolor{frametitle}{fg=black}

\setbeamercolor{bgcolor}{fg=black,bg=blue!20}
\pgfdeclareimage[width=\paperwidth]{mybackground}{back.pdf}

\setbeamertemplate{background canvas}{%
    \begin{picture}(30,273)
     \begin{beamercolorbox}[wd=1.1\paperwidth,ht=\paperheight]{bgcolor}
     \end{beamercolorbox}
        \put(-310,0){%
            \pgfuseimage{mybackground}
        }
    \end{picture}
}

\begin{document}

    \begin{frame}
        test
    \end{frame}

    \setbeamercolor{bgcolor}{fg=black,bg=red!20}
    \begin{frame}
        test
    \end{frame}

\end{document}