Site Hierarchy: Add Child or Parent Site
Flexible site hierarchy allows you to model complex internal or customer organizations based on levels such as Business Unit, Region, District, Office, and Individual sites.
Steps:
1). Open the site to which you want to add parent or child site.
2). On the tabbar, click Hierarchy.
3). To add parent site, click Search button beside Parent Site field, select the desired site and then, under General tab, click Save.
4). To add child site, click Search button beside Child Site field, select the desired site and then, on the toolbar, click
Add Child Site. Once you add the child site, it should display in the Child Sites grid.