[Image-SIG] how to draw a subscript in text

[Fei Xu]

Hi!
Is there any module in PIL, which draws a subscript such as G0 (here 0 is a subscript) in text? If we cannot 
draw a subscript letter or number automatically, I have to change the font size and calculate the locations of 
the subscript letters thoroughly. Or if there is no subscript module, could you tell me any clever way to write a 
subscript?

Thanks!

Best,

Fei