Re: question about linespace adjustment

[Lars Huttar <lars_huttar@sil.org>]

Aditya wrote,
> Contrast
>
> {\switchtobodyfont[14pt] \input ward \endgraf}
>
> with
>
> {\tfc \input ward \endgraf}
>

Thanks for your help. You've left me to draw my own conclusions from
this example, so I'll say what I think this implies, and please correct
me if I'm wrong.

(Note to other non-TeXnichians: \endgraf is a TeX synonym for \par: end
of paragraph.)

I think the principle that you're trying to demonstrate is that the
answer to my last paragraph is yes: there is an important distinction
between "making a font switch," e.g. \tfc, and "using a new body font",
of which \switchtobodyfont is apparently an example.
Namely, that the latter causes the interlinespace to be automatically
adjusted, whereas the former doesn't unless you explicitly use
\setupinterlinespace.

Can you explain how/why the two ways of increasing the font size should
have such different effects? (I have read section 5.8 and 5.9 about
selecting bodyfonts and interlinespace but still don't get it.)
\tfc is described as a "font selector" command (5.3.2). It seems to me
that both \tfc and \switchtobodyfont[20pt] simply attempt to switch to a
different size of whatever bodyfont is currently in effect. But there
must be something I'm missing. (Or else it's just an arbitrary
distinction, but that seems unlikely.)

Lars

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