\begin{tikzpicture}
\draw (0,0) rectangle (5,5);
\node at (2.5,2.5) {\temporal<2>{before}{now}{after}};
\onslide<3> {}; % just a small trick to create 3 subframes
\end{tikzpicture}
Generated by dwww version 1.15 on Mon Jun 24 08:35:38 CEST 2024.