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I would like to change the behaviour of \alert so that the text is still red but now boldfaced, say. How can I do this? I have Googled, but all I can find is how to change the colour, as in Changing style of alert environment in beamer.

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up vote 13 down vote accepted

After some digging, I located the definition of \alert in beamerbaselocalstructure.sty. The rest was easy. ;-)

EDIT: There's also a more "beamer-like" way. :-)


% \renewcommand<>{\alert}[1]{\begin{alertenv}\bfseries#2#1\end{alertenv}}
\setbeamerfont{alerted text}{series=\bfseries}


\alert{Some text.}

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By the way, the former \renewcommand didn't work for me for some reason... the latter does though! – Werner Feb 28 '12 at 19:30
Many thanks! I didn't think to look in the code :( – José Figueroa-O'Farrill Feb 28 '12 at 19:33

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