Complex sentence: A subscript or superscript is a number, figure, symbol, or indicator that is smaller than the normal line of type and is set slightly below or above it--subscripts appear at or below the baseline, while superscripts are above.
Split into simpler sentences: A subscript or superscript is a number, figure, symbol, or indicator that is smaller than the normal line of type and is set slightly below or above it. Subscripts appear at or below the baseline, while superscripts are above.