Tools > Customize
Although you can right-click on styles in the task pane and select modify
from there, as well.
You can also change Word to give you the old Styles dialog when you want it
(in addition to the task pane).
http://addbalance.com/word/download.htm#Word_2003
http://sbarnhill.mvps.org/WordFAQs/CustomizingWord2002.htm

Signature
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://word.mvps.org/FAQs/ which is awesome!
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from my ignorance and your wisdom.
> One of my clients is using Word 2002 SP3 and has a 'style' and 'modify
> style' option under the Format menu. Her assistant does not have this
> option (but she does have the 'style & formatting' option. Does anyone
> know how to add these to her menu?