The appearance of the fields in a page layout is controlled by the Page Layout option for the object.
Click Setup to return to the Setup menu, and then Create Objects to bring up a list of objects.
Click the Location link to bring up the attributes for the object. The Edit link for the Location object lets you edit the attributes for the object itself. At the top of the page you can see links for different attribute sections.
Let your mouse hover on the Page Layouts link to bring up the Page Layout section at the top of the page, and then click the Edit link for the page layout to bring up the page shown in figure ...