Sstrhsrtj

I would like to add on my beamer slides something that simulate as if I had been drawing a comment by hand. This would circle, come on top of text or formulas, and allows to insert text. Ideally, I could use this with the beamer overlay specification, i.e. add it only in a second step. See example below.

Is there anything that could bring me somewhere close to that?

documentclass[english]{beamer}



usepackage{babel}



begin{document}

begin{frame}{Make Titles Informative. }



Iintroduce here two theorems:

  begin{theorem}

Algebra



1+2=3

end{theorem}



begin{corollary}

2+1=3

end{corollary}



end{frame}





end{document}

Thanks!

As pointed out by @cfr, tikzmark is very useful here. In addition, decorations.pathmorphing comes with random steps, which arguably looks as if you would have drawn it with your own claws, err, sorry, hands.

documentclass[english]{beamer}

usepackage{tikz}

usetikzlibrary{tikzmark,decorations.pathmorphing}



begin{document}

begin{frame}{Make Titles Informative}



Introduce two tikzmarknode{theorems}{theorems} here:

begin{theorem}

Algebra



1+2=3

end{theorem}



begin{corollary}

2+1=tikzmarknode[circle,draw=red,decorate,decoration={random steps,segment

length=1pt,amplitude=0.4pt}]{3}{3}

end{corollary}

begin{tikzpicture}[overlay,remember picture,decoration={random steps,segment

length=1pt,amplitude=0.4pt},red]

draw[decorate] (theorems.south west) -- (theorems.south east)

to[out=-40,in=180] ++ (2,-1) node[right]{comment};

draw[decorate] (3)

to[out=-40,in=180] ++ (2,-1) node[right]{some text};

end{tikzpicture}

end{frame}

end{document}