Step 1. Hover over Website, and click on manage

All of the pages in your website are under My Pages . Checkbox enabled as shown is live in your website

To reorganize the page you can hold and click on the page and then drag it to the position where you want to put it

To modify a page you can click on the three dots, then click on Edit

You can click on view on site to check how it looks like

How to Setup and Modify A Child Page  

The plus sign means that if it has a plus sign there is a subpage or a child page   

To add a child page you can click on the three dots and then click on add child page  

Add the child page's title, slug,select the template, then click save

You can click on the child page that you have created and make sure that you have set it to show in your navigation and for it to show on the site  

You can add a plugin and content to your child page and click on save

To move other pages and turn it into a child page you can hold left click and then drag it below a main page