How to Create a Page within a page - a sub page.
Click on New page
Name the new page and click on create.
Insert your page content.
Save.
Go to the page in which you want the new page to sit.
Type the title of the page.
Highlight the title and click on the hyperlink symbol on the Editor toolbar.
A pop up window "Create a Link" will come up on the screen.
Type in the name of the page you created and click OK
SAVE