topnush
I have this MWE:
```
\documentclass{beamer}
\usepackage{tikz}
\begin{document}
\begin{frame}
\tikzstyle{vertex}=[very thick,draw=black, circle,minimum size=18pt,inner sep=0pt]
\tikzstyle{edge} = [draw,very thick,-]
\begin{figure}
\begin{tikzpicture}[scale=1.8, auto,swap]
% First we draw the vertices
\foreach \pos/\name in {{(0,2)/s}, {(2,1)/b}, {(4,1)/c},
{(0,0)/d}, {(3,0)/e}, {(2,-1)/f}, {(4,-1)/t}}
\node[vertex] (\name) at \pos {$\name$};
% Connect vertices with edges and draw weights
\foreach \source/ \dest / \myoverlay in {
b/s/2-6,
c/b/3-,
f/e/4-8,
e/t/5-,
f/d/6-,
%e/c/7,
s/c/8-,
% f/d/9,
d/b/10-,
e/c/11-,
e/f/12
}{
\path<\myoverlay>[edge] (\source) -- node {} (\dest);
}
\node<1>[anchor=west] at (0.05, 3) {\Large Edges arrive and disappear online};
\node<2-6,8,10>[anchor=west] at (0, 2.7) {\Large Add edge};
\node<11->[anchor=west] at (0, 2.7) {\Large Add edge. $s$ is connected to $t$.};
\node<7,9>[anchor=west] at (0, 2.7) {\Large Delete edge};
\end{tikzpicture}
\end{figure}
\end{frame}
\end{document}
```
The problem is that when "Add edge" is shown, the graph below it moves. I don't know how to do the equivalent of `uncover` in TikZ.