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I got a problem when trying to change the fontsize within a beamer-class frame.

\documentclass{beamer}
\begin{document}
\begin{frame}{First frame}
{\big Just some content} 
\end{frame}
\end{document}

This gets me a "missing delimiter (. inserted)" error. What's the problem with this? I'm using the pdfLaTex compiler.

Thanks a lot!

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closed as too localized by cmhughes, egreg, lockstep, Marco Daniel, Thorsten Oct 24 '12 at 15:33

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2  
Where's the delimiter? \big needs a bracket of some sort otherwise it feels lonely: \big( or \big[ or \big\{. Also, it tends to only work in math-mode: \(\big(\). –  Loop Space Oct 24 '12 at 14:18
1  
Oh, now I understand! \big isn't a fontsize command like \huge or \large. It's for resizing "delimiters": things like brackets or \|. It's from amsmath which is loaded by beamer. –  Loop Space Oct 24 '12 at 14:18
    
Wow, that was fast! Thanks! Totally solved it. –  the-bass Oct 24 '12 at 14:21
    
voting to close as too localized, glad you got it fixed :) –  cmhughes Oct 24 '12 at 14:23
    
@cmhughes Not sure about closing this: once I'd realised the issue I thought it actually quite a reasonable mistake to make particularly as \big is defined in amsmath and that isn't explicitly loaded. –  Loop Space Oct 24 '12 at 14:27
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1 Answer 1

up vote 1 down vote accepted

Andrew Stacey provided the answer: \big belongs to math-mode and is defined by amsmath which is loaded automatically by beamer, I was looking for something like \huge or \large.

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Given that amsmath isn't explicitly loaded (it's loaded by beamer) I thought it worth adding that information. Hope that's okay. –  Loop Space Oct 24 '12 at 14:26
    
Absolutely. Thanks. –  the-bass Oct 24 '12 at 14:29
    
\big is a standard math mode LaTeX command (it is redefined by amsmath, though). You find the definition at line 526 in fontmath.ltx –  egreg Oct 24 '12 at 14:40
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