How do I change uppercase to lowercase without re-typing (Excel)

[kellyu]

How do I change words from uppercase to lowercase without re-typing the words
completely...
e.g. WORKSITE to Worksite or worksite.
Thanks,
Kelly
(e-mail address removed)

 

[Jim Thomlinson]

=Upper(A1)
=Lower(A1)
=Proper(A1)