Yes ... and no.
Assuming you formatted your original documents using styles, you apply
updated styles of the same name to the original documents.
http://addbalance.com/usersguide/styles.htm.
If not, there is no easy way. Replace may be helpful, depending on exactly
how formatting was applied, because the replace function can replace
formatting.

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Charles Kenyon
Word New User FAQ & Web Directory: http://addbalance.com/word
Intermediate User's Guide to Microsoft Word (supplemented version of
Microsoft's Legal Users' Guide) http://addbalance.com/usersguide
See also the MVP FAQ: http://www.mvps.org/word which is awesome!
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from my ignorance and your wisdom.
> Hi, we have a Word documents, well actually 100 of them (each of 100 or
> so pages), that have been formatted in a particular but consistent style.
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> Thanks
> S