Hi, if you log into your site dashboard click on "sitemap" at the top of your left side menu, then click on "flat view" which should be along the top of the page, once in flat view, hover your cursor over the little paper type icon next to the name of the page you wish to move, it will turn into a crosshair, you can now click on the page you want to move and drag it to its new location, this will then be reflected in your sites main navigation.