Click on the Layout tab. Under the Headers and Footers section make sure that there is a check mark next to Different first page. Click OK . If you need to change or delete a header or footer and not affect the other headers or footers in the document, you will need to disconnect the headers or footers from each other. This involves using section breaks.
Section breaks divide parts of a document into segments.
Unlike a page break, the section break may or may not necessarily involve stopping a printed page at a certain point. For example, a document has 30 pages. The first page, perhaps a title page, will not have a footer while the rest of the document will. See the section above on how to create a different footer for this first page. Later in the document, however, the footer needs to change again.