The 2 in H20 should be subscripted. The keyboard shortcut for the subscript
format is Ctrl+=. You can either press this before typing the 2 and again
afterward, or type the 2, select it, and press the keyboard shortcut. The
keyboard shortcut for superscript (used for exponents) is Ctrl+Shift+=.

--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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"ellie" wrote in message
...
How do I type simple chemical formulae, ie H2O - water, so that the 2 is
in a
smaller font and below the preceeding letter?