Hi, the manual says that if I use \switchtobodyfont[48pt] (with the size 48pt not previously defined, then the interline space and other parameters are taken from the nearest smaller body font environment is that is already defined (co-typography.pdf, p. 13). Then, why \starttext \switchtobodyfont[48pt] Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! \stoptext works the same as \starttext \definebodyfontenvironment[48pt] \switchtobodyfont[48pt] Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! \stoptext i.e., correctly? I expected too small interline space in the former case, but it seems correct. (That's fine for me, obviously, but I'd like to understand that!) Cheers -- Marcin Borkowski (http://mbork.faculty.fmcs.amu.edu.pl)