Aditya Mahajan <adityam <at> umich.edu> writes:
> Here is a simplified picture. Basically, anything inside btex ... etex (or
> textext(...) or \sometxt{...}) is in what is known as TeX's horizontal
> mode. Think of this as what you will get if you put the same argument in a
> \hbox (see the TeXbook or TeX for the impatient for details). To get
> multiple lines you need tex to be in the vertical mode, a \vbox. A vanilla
> \framed is like a \hbox. Framed with align=normal is like a \vbox. So, for
> most purposes you can you \framed. There are some commands that need to
> know the width of the box (like \start stop formula). In those cases you
> need to specify width=something to \framed.
>
> Of course, certain objects like floats, footnotes, marginpars, will never
> work inside metapost. (I think you can get floats and footnotes to work,
> but that will require some hackery)
>
> Aditya
Thanks very much for the explanation. Now I understand much better. I remember
reading about the importance of horizontal mode and vertical mode in the Seroul
and Levy's book I think.
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