To: Removing,
Once you have the header/footer menu open, try moving your cursor into the
header or footer itself and selecting the page number so to delete it. If
when you open your header or footer, if the page number no longer appears for
you, try clicking on the "Show Next" icon or "Show Previous" icon or toggle
the "Switch Between Header and Footer" until you can see the page number.
While the menu can add information to your headers and/or footers, you can
edit the headers and footers yourself once they are open. In fact, even when
it adds information, it adds it to where the cursor is.
Steven Craig Miller