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I found a way to piece-wise highlighting in beamer but I also want to dim the previous items as the beamer starts to uncover the newer sections. I have done something like this in powerpoint but stuck on latex beamer. Any help is highly appreciated on how to dim the previous section color.


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What do you mean with "section"? Are you referring to section entries in the ToC? – Gonzalo Medina Jun 20 '13 at 2:35
What I mean is as the beamer starts to uncover the new items, I want to dim the color of the previous items on the same page/frame. I want the audience to focus on the present topic only that I am showing. – Jdbaba Jun 20 '13 at 2:38

You can use \setbeamercovered together with overlay specifications; a little example (for further details, please refer to Section 17.6 Transparency Effects of the beamer manual):




\item<1> First itemized item.
\item<2> Second itemized item.
\item<3> Third itemized item.

\setbeamercovered{still covered={\opaqueness<1->{0}},again covered={\opaqueness<1->{10}}}
\onslide<1>{Some initial idea.}

\onslide<2>{An interesting development.}

\onslide<3>{An unusual conclusion.}


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