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