# Uncover lines of an align environment with beamer

Is there any way to uncover equation-lines of an align* environment line per line in a frame conveniently?

somethink like

\begin{align*}[<+->]
a &= b \\
b &= c \\
a &= c \\
\end{align*}


or at least only one annotation per line.

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Section 23.4 of the beamer manual describes how this can be done – egreg Jun 21 '12 at 13:10

Since you have an untagged environment, you can use

\documentclass{beamer}

\begin{document}

\begin{frame}
\begin{align*}
\onslide<1->{a &= b \\}
\onslide<2->{b &= c \\}
a &= c}
\end{align*}
\end{frame}

\end{document}


For a tagged environment additional work has to be done, as described in Section 23.4 Uncovering Tagged Formulas Piecewise of the beamer manual:

\documentclass{beamer}

\begin{document}

\begin{frame}
\begin{align}
\onslide<1->{a &= b \\}
\onslide<2->{b &= c \\}
a &= c \\}
\notag
\end{align}
\vskip-1.5em
\end{frame}

\end{document}

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Thanx a lot, I didn't realize this worked, as I had made another mistake and misinterpreted the errors i got. I haden't found this when googling/searching here for solutions however. – IARI Jun 21 '12 at 13:15