tex-suscript-height-ratio

tex-suscript-height-ratio is a variable defined in `tex-mode.el'.
Its value is

0.8

Documentation:
Ratio of subscript/superscript height to that of the preceding text.
In nested subscript/superscript, this factor is applied repeatedly,
subject to the limit set by `tex-suscript-height-minimum'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 23.1 of Emacs.