[texhax] plain TeX: `No room for a new \fam'

[Rodolfo Medina]

karl at freefriends.org (Karl Berry) writes:

> Hi Rodolfo,
>
>     I'm a plain TeX user, and have already loaded 16 \newfamS.  Is there
>     any way to get round TeX's complain?  To, say, create room for
>     another 16 families?
>
> 1) Use luatex or xetex.
> 2) Deallocate/allocate families in between formulas as needed.
>
> If you search for something like 
>   more than 16 math families tex
> you'll get a bunch more q&a's on this topic.
>
> Hope this helps,
> k


Thanks.  But how do I `Deallocate/allocate families in between formulas as
needed'?

And, excuse my poor English, but what does `you'll get a bunch more q&a's on
this topic' mean?

Thanks

Rodolfo