A parent site can contain child sites. You manage child sites the same way as default and parent sites. Select the child site in the Sites & settings treeview. On the Tasks tab, you design your site from sections such as Pages & templates, Parts, and Friendly URLs. On the Settings tab, you select site-specific settings such as languages to support, registration and login options, and whether to use reCAPTCHA for payments.
For information about how to create a site, see Manage a Parent or Child Site.
Note: You can select for child sites to inherit security assignments from parent sites. You can also edit the inherited security settings for a child site. For more information, see Security Assignments.