Depends on what site template you use to create your site, some menus appear in one site but not on another. Here are some links that you can type in directly after the site/sub-site root to get that function:
- Save site as template: _layouts/savetmpl.aspx (this feature allows you to take a copy of the sit – option to include the content as well – and to create a new site from it.) However, there is a limit of the size of the content – 10 MB. Content will be excluded if the content is more than that. Same for list template.
- Welcome page: _layouts/AreaWelcomePage.aspx