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

\begin{frame}{First frame}
{\big Just some content} 

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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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
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
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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