This command brings up the Headers and Footers layout options page. Here you can specify what and how information is printed on your Headers and Footers.
This button brings up the Document Properties dialog, which you can use to set the values of your document's header and footer fields.
Click on the button to lock/unlock your style selections. When locked, your style selections will be applied to the headers/footers for ALL pages on your document. When unlocked, you can set the individual headers/footers for your document's first page, even pages, and odd pages separately.
Use the left/right arrows on the sides of the header/footer previews to flip through preset header/footer styles.