You need to unlink the landscape header from the portrait headers before and
after it before changing the formatting. See
http://home.earthlink.net/~wordfaqs/HeaderFooter.htm

Signature
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.
"Headers! Help me PLEASE!" <Headers! Help me
PLEASE!@discussions.microsoft.com> wrote in message
news:643BD260-AAB5-49BF-B5E3-2A4E07FD8035@microsoft.com...
> How do I set up different headers for one document that consists of pages
> that are portrait and landscape, without affecting the others and messing up
> the page numbering? (I have a document with the same header, but I just want
> to make the header adjust to a landscaped page without changing the length of
> the other headers on the portrait pages).