用 \node 的 rotate 键。
\documentclass{beamer}
\usepackage{tikz}
\usebackgroundtemplate{\begin{tikzpicture}
\draw[use as bounding box] (0,0) rectangle (\paperwidth,\paperheight);
\node[inner sep=0pt,outer sep=0pt,rotate=3*\value{page}] at(.25\paperwidth,.75\paperheight)
{\pgfimage[width=0.5\paperwidth]{example-image}};
\end{tikzpicture}}
\logo{\includegraphics[width=2cm, angle=\arabic{page}, origin=c]{example-image}}
\begin{document}
\frame{\arabic{page}}
\frame{\arabic{page}}
\frame{\arabic{page}}
\frame{\arabic{page}}
\frame{\arabic{page}}
\frame{\arabic{page}}
\frame{\arabic{page}}
\frame{\arabic{page}}
\end{document}1 个回答
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perfect. 谢谢大佬砍瓜切菜般的解决了！