# [NTG-context] definetypeface usage

Trying to findout how ConTeXt's font mechanism works, I come to following question:

From the brochure "Fonts in Context" (mfonts.pdf) I have picked up the notion that exercising a call to \definetypeface gets fonts in working order (see the examples there on font specifiers "funny" and "whow", for example, and the resulting typeface collection).
Also in file type-exa.tex there is a typescript [postscript] where \definetypeface is exercised, seemingly to bring a matched series of times, helvetica and courier into existence.
However, the usage of the postscript fonts via \setupbodyfont[pos] seems to be completely unconnected with this script (I traced the typescript checking). Neither can I find somany calls to \definetypeface (and its derivatives \dodefinetypeface and \dododefinetypeface); it seems they are barely used in the code.
So, the questions are:
- Does \setupbodyfont[pos] results in the scaled font set as given in type-exa?
- Or does \definetypeface belong to an alternative/obsolete font definition scheme, totally unrelated to the definitions called up in the scripts in type-pre.tex, type-syn.tex, and other friends?
- In preparing font scripts, can I therefore totally ignore \definetypeface or will that be disastrous for the result?

```If somebody would be so kind to enlighten me...
Hans van der Meer```

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