See http://word.mvps.org/FAQs/Formatting...tRidOfLine.htm for one
possible solution.

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Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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"Xu Liu" Xu wrote in message
...
there is a long line that you can move up and down in the header and
footer
box, i want to remove it