Beamer: Transparent and slightly below the center logo

Question

I tried to modify the answer in this thread.

Basically, I would like that the transparent logo would be slightly lower than the center.

I tried the following:

\documentclass{beamer}
\usepackage{tikz}

\usebackgroundtemplate{%
\tikz[overlay,remember picture] \node[opacity=0.3, at=(current page.center, yshift=-1.5cm)] {
   \includegraphics[height=\paperheight,width=\paperwidth]{example-image-a}};
}

\begin{document}

\begin{frame}
Background transparent image, centered on slide
\end{frame}

\end{document}

Unfortunately, it does not work. Any suggestion? Thanks in advance.

Answer 1

There is misplaced ) in your code, otherwise yshift works fine:

\documentclass{beamer}
\usepackage{tikz}

\usebackgroundtemplate{%
\tikz[overlay,remember picture] \node[opacity=0.3, at=(current page.center),yshift=-100] {
   \includegraphics[height=\paperheight,width=\paperwidth]{example-image-a}};
}

\begin{document}

\begin{frame}
Background transparent image, centered on slide
\end{frame}

\end{document}