Adding new pages
The 'Define New' button > Sort order
You can find this field by clicking the 'Define New' button for a new page, or the 'Define' button for an existing page.
Use the Sort Order to sort the pages in a particular order in your navigation menu on your site. If all the pages are left to zero in the sort order, your pages will be sorted alphabetically. Changing the sort order does not automatically change related pages. You must change each related page's sort order individually, if necessary.
Here's what the Define screen looks like for the 'Sort order' page you're now viewing:
See how 'Adding new pages' is nested under 'Your site content,' and this 'Sort order' page is nested under 'Adding new pages,' and is sorted in the Sort Order to be the sixth page? Here's what that looks like in the live site's navigation bar: