[texhax] Lower subscripts

[Philip TAYLOR]

Barbara Beeton wrote:

> oh, phil, surely you haven't forgotten
> that if there's a superscript, the
> subscripts are pushed down!
> 
> how about this:
> 
>   $\rho^{}_{X_1 X_2}$

Of course I'd forgotten :-)  But worse, I failed to
put on my +2.0 glasses and see that David had
actually used braces around the subscript; to me,
they looked like round brackets, and I could not
understand why it was subscripting everything and
not just the first term !  Normally +1.25 are fine
for screen work, but they don't really shew the
difference between braces and round brackets ...

** Phil.