Hi Fran,
There are several categories of formatting in Word, but subscripts or
superscripts are removed only if you change the font formatting. For example,
if you clear the paragraph formatting by re-applying the Normal style, your
subscripts, superscripts , and other font formatting should not change. You
can change the font formatting of the selected text by applying a character
style, by pressing Ctrl+spacebar (which clears all font formatting), or by
changing the settings in the Font dialog box. To clear the font formatting
without losing your subscripts and superscripts, select the text to clear
(for example, by pressing Ctrl+A), open the Font dialog box (pressing Ctrl+D
should open this dialog box in most versions of Word), set the font, font
style, and font size to the default values, set the font color to automatic,
set the underlining to none, and clear all the font effect checkboxes except
Superscript and Subscript.