[metapost] Problem with defaultscale

[Taco Hoekwater]

Oliver Buerschaper wrote:
>> Defaultscale only works for string labels, not for btex ... etex
>> labels. But the good news is that scaling a btex ... etex label
>> is really simple also:
>>
>>   label(btex Hallo $\sum$ etex scaled 6, origin);
> 
> One more thing perhaps … I just realized that this scales the text 
> *after* TeX typeset it, doesn't it? Now how can I make TeX itself 
> typeset the text at the right font size (especially math) such that I 
> get the opticals right? Would I have to use a preamble like the one 
> Laurence suggested?

Yes, something like that. But as noted already: redefining math fonts 
isn't a lot of fun, so you may decide not to bother (I certainly
wouldn't).

Best wishes,
Taco