On Tue, 24 Sep 2013, Lars Huttar wrote:

> Hello,
> I'm working through the reference manual trying to understand how things
> work in regard to fonts. I'll be submitting clarifications and
> elaborations to the manual in an attempt to help other non-experts to
> grasp the design of ConTeXt.
>
> There's a point that's confusing to me in section 5.5, Line spacing. On
> page 108 of the manual it says
> "Linespacing alters when a new bodyfont is used or when linespacing is
> defined explicitly by \setupinterlinespace (which is explained later)"
>
> But on the next page it says,
> "When you make a font switch the linespacing is adapted when you give
> the command \setupinterlinespace without any setup parameters and also
> when you add the key reset, for example..."
>
> So here's why I'm confused. When you change fonts, (a) does linespacing
> get changed automatically, or (b) do you have to say
> \setupinterlinespace? If (a), then why does the second quote above seem
> to say you need \setupinterlinespace to make it happen? If (b), then
> isn't the first quote above inaccurate?
>
> Is there a distinction being drawn here between "when a new bodyfont is
> used" and "when you make a font switch", or are those just variant
> phrasings for what is intended to mean the same thing?

Contrast

{\switchtobodyfont[14pt] \input ward \endgraf}

with

{\tfc \input ward \endgraf}

Aditya