Subscript

[renama]

We tried to use C₁C₂, but subscript 1,2 does not show in Vizard editor, (superscipt ², ³ works fine). We need to use subscript a lot in our math teaching software developed with Vizard. Right now we can do is to create a new text 1 or 2, reduce the scale and put it into the position beside the C. But this causes much inconvienient to us(many times to try the position). Could anybody tell us how to solve thhis problem? Thanks in advance.