[OS X TeX] Underfull \vbox

Roussanka Loukanova rloukano at stp.lingfil.uu.se
Sun Jun 24 14:26:51 EDT 2007

On Sun, 24 Jun 2007, Bruno Voisin wrote:

> Le 24 juin 07 à 16:25, Roussanka Loukanova a écrit :
>> Does anybody know how to resolve in a good way the problem causing 
>> following warning in the output (and log) file:
>> Underfull \vbox (badness 10000) has occurred while \output is active [2]
>> I only got that it is due to the location of  \section{...} about the end 
>> of a page and that LaTeX is outputting the section title at at the 
>> beginning of the next new page. But if I force the \section{...} on a new 
>> page by
>> \newpage
>> \section{...}
>> the warning disappears.
>> Is there a better solution? Is it just better to leave the warning without 
>> attempts to get rid of it?
> I don't think you should worry about the warning, LaTeX seems to be doing the 
> right thing: moving the new section to the next page, even if that means 
> leaving a bit too much blank space on the previous page than it would like 
> too.

This is my feeling too, esp. because this is the last step in the 
submission for proceedings. But then, they may not like the warning...

> As always, you can also redefine LaTeX's standards, which would mean with the 
> article class changing the default from article.cls:
> \newcommand\section{\@startsection {section}{1}{\z@}%
>                                   {-3.5ex \@plus -1ex \@minus -.2ex}%
>                                   {2.3ex \@plus.2ex}%
>                                   {\normalfont\Large\bfseries}}
> Here the second line defines spacing before a new section, with the plus and 
> minus quantities defining the amount of stretchable and shrinkable space 
> LaTeX can add and remove, respectively, in order to abide by its criteria 
> about how much vertical blank space is allowed on a page.
> You could try something like:
> \makeatletter
> \renewcommand{\section}{\@startsection{section}{1}{0pt}%
>  {-3.5ex plus .1\textheight minus .05\textheight}
>  {2.3ex plus .05\textheight}%
>  {\normalfont\Large\bfseries}}
> \makeatother
> Beware though: that might change page breaks significantly for the whole of 
> your document.

Yes, I'm afraid of using so complicate things. Thanks to all of you. (I'll
be still watching this night for more suggestions, and after that too
such things may pop-up again.).


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