st: Special character in a plot's legend

["MA V" <ma_v@hotmail.com>]

Hi--
I am having some trouble adding a special character to a legend in a plot. 
Following the suggestion from a previous post, what I am doing is:
local sigma=char(228)
twoway histogram sig, den || spike max true, by(X)  legend(label(2 "True")) 
yti(Density) xti("`sigma' for sets")

But, only a blank space appears where the character should be (in the 
legend).

I also tried
twoway histogram sig, den || spike max true, by(X)  legend(label(2 "True")) 
yti(Density) xti("`char(228)")
but it didn't work...

I also read that this might happen for some fonts so I tried the same thing 
after changing the graph preferences to "Arial" and "Times New Roman" but 
this also didn't work.

Any idea of what I'm doing wrong?

Also, is there any way of adding subscripts in a legend?

Thanks,
MA

Note: I am using Stata9 for MAC

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