When you click on the Settings tab at the top of a page you open the first (default) item under Settings, namely Edit.
The page settings you can access under Edit are:
General settings
Change the Page name and/or the URL name.
Permissions Change who can view the page, who can create and edit content on it, who can add sub-pages to the page, and who can change the page settings.
Appearance Determine where the link to the page will appear in the Navigation window and where on-screen the contents of the page will display.