答案1
举一个简短的例子,供您参考:
\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{overlay-beamer-styles}
\begin{document}
\begin{frame}
\begin{tikzpicture}
\node {\includegraphics[width=.5\textwidth]{example-image}};
\node[visible on=<2>] (a) at (4,-2) {text};
\draw[<-,red,visible on=<2>] (0,1) -- (a);
\end{tikzpicture}
\end{frame}
\end{document}