Format as superscript or subscript
Superscript characters are reduced in size and shifted above the text baseline; subscript characters are reduced in size and shifted below the text baseline. If the font does not include superscript or subscript characters, After Effects generates faux superscript or subscript characters.
- Click the Superscript button
or
the Subscript button 
in
the Character panel. - Choose Superscript or Subscript from the Character panel menu.