SHX fonts have limited superscript and subscript capabilities. However, it is relatively
easy to modify shape definition files to improve superscript and subscript capability.

Creating superscripts and subscripts requires two steps. First, the “imaginary penâ€‌
that is creating the text, vector by vector, on your screen needs to be shifted up
or down. Then, the font “scaleâ€‌ needs to be reduced. In addition, the reverse process
has to take place to return to the normal font. The font needs to recognize four new
keys: two for superscripts and two for subscripts. To avoid altering the existing
font definitions, you can access these with the numeric keypad on your keyboard.