How to Create a Sub-Page:
As Shown in the image below, simply click on "My Sub-Pages" and then select "New Sub-Page" from the drop down menu.
Within "Open/View Pages" there is ability to rearrange the order of sub-pages, rename each, publish/unpublish sub-pages each, and get a Smart URL for
a individual sub-page.
Click any link name to open that page. Under "Publish" simply click to toggle "yes" for published (green light) or click again to toggle to "No" (red light) which unpublished a sub-page. The sub-page you set as "Make Default" would be the first sub-page in this tab to open when the tab is loaded by visitors. You can use the arrows to change the order of the sub-pages.