I need a clue, please. I don't understand the relation between typescripts for font definitions and bodyfonts or bodyfontenvironments. I began with typescripts when I started using Context and never learned much about the underlying mechanism. I've studied "Fonts in Context" (mfonts.pdf), but I still don't get it.

I define typescripts for my fonts. They have no size specification. I understand that when I declare something like:

\definetypeface [Sabon] [rm] [serif] [sabon] [default] [encoding=texnansi]

that typescript "[serif] [default] [size]" in type-siz.tex will be used for the size info, but I don't know what that gets me. That typescript has:

\definebodyfont [4pt,5pt,6pt,7pt,8pt,9pt,10pt,11pt,12pt,14.4pt,17.3pt] [rm] [default]

I don't know what that list of sizes means. I can use \setupbodyfont and \switchtobodyfont to specify any arbitary full or fractional point size and all works well.

But: now and then I hit a problem which is caused by missing definitions of some sort. For example, the hanging punctuation in this job:

\usetypescriptfile[type-sabon] \usetypescript [serif] [hanging] [sabon] \usetypescript[Sabon] \setupbodyfont[Sabon,9pt] \setupalign[hanging] \showframe

\starttext \dorecurse{5}{\input knuth \input tufte } \par \stoptext

Note that I have the typescript "[serif] [hanging] [sabon]" and it declares the hanging parameters.

With 9pt: no hanging. But it does work if I specify 12pt, 10pt, 8pt, or even 9.1pt. What is special about 9pt? I presume I should be specifying size info somewhere, but I don't what or where.

-Bill