You can add new pages either straight from the workspace's admin menu or from the Pages tab in the Workspace Manager.
"New page" button in the admin menu.
The "New page" button can be found in the top right corner of the "Pages" tab in the Workspace Manager.
How to add one page to the workspace:
Open the Admin menu or "Pages" view and click "New page"
You can choose from
Give the new page a name and other settings to your liking. More information about page settings can be found here.
Click "Create"
The new page will appear as the last item in the top navigation menu