For all of the editing of Navigation on your site, here is where you start.  First, in your Dashboard, click on the website you want to edit.

First, click on the Websites App in your Dashboard display.  Then click on the site you want to edit.  Here’ we’re editing the Main website, so clicking on it takes you to the site in the Edit mode.

Since we’re working with pages, on the right side where we see our site edit icons, we click on the NAVIGATION icon to get to the screen where we can manage our pages.  You'll get a pop-out to move pages or edit your navigation.