You can't edit an AutoText entry. Instead, insert the existing entry
into any document and make your changes. Select the revised text and
press Alt+F3. Put in the same name, gallery (AutoText), and category
as the existing entry, and click OK. Answer yes when asked whether to
redefine the existing entry.
Maybe this method will work for you. It depends on the kind of changes you
want to make.
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Regards
Lene Fredborg - Microsoft MVP (Word)
DocTools - Denmark www.thedoctools.com
Document automation - add-ins, macros and templates for Microsoft Word