How to: Change the superscript or subscript font size.
Solution:
Select the text and select a smaller font point size on the Font Format tab or type custom points in the character spacing tab box.
1) Select the text.
2) Select the 'Format' menu and select 'Font...'. (The Font dialog box appears.)
3) Change the font size and/or appearance:
NOTE: Available font sizes depend on the font selected or installed.
a) Select a smaller or larger font size from the 'Size' list box.
b) Select a different font from the 'Font' list box.
4) (Optional) Click 'Character Spacing' tab.
a) Select a position from the 'Position' drop down list box.
b) Type the number of points between the font and the baseline in the 'Points and Above' box. (The preview window displays the changes.)
5) Click 'OK'.