How to create a custom page as an admin?

For an admin to create a custom page he needs to do the following:

Firstly, the admin needs to login as an admin.
Then the user needs to ‘Pages’ submenu under the ‘Website’ menu.
And click the ‘Add New Page’ button.
There he will get a form where he will be able to set the detailed information about the page.
Finally, by clicking the ‘Add Page’ button he will be able to add the new page to his website.