Multiple text sizes in a Single Dimension

Is it possible to have multiple text sizes in a single dimension? 

I want to have two lines of dimension text with the top line being the numerical value and bottom line the reference equation.  I would like the text in the second line to be smaller than the top line. 

As of now the only way I know of accomplishing this is to add a note with a smaller text size below the dimension.

Thanks for any input.

Brett

SolidworksDrawings And Detailing