答案1
\usepackage{tikz}
并且,在“框架”内:
\begin{frame}{DAS Argument}
\begin{tikzpicture}[remember picture,overlay]
\node[opacity=0.1,xshift=0cm,yshift=-0cm,at=(current page.center)] {
\includegraphics[height=2cm,scale=1]{example-image-golden}
};
\end{tikzpicture}
\end{frame}
相应调整 xshift/yshift 和/或高度。