To add a new page to the site
Look for a button “New” at the very top of the screen when logged in
Choose the sub-menu category “Page” from that menu

Here you can choose when page template you would like to use to render the content on your new page.

Once you are done editing, hit publish and to view the page just click the button at the top that says “View Page”

NOTE: Once you have added a new page you can visit the menu item’s page to add that new page to the menu. For more information visit: Managing navigation menus (Main navigation menu and Footer menu)