A family that contains nested and shared families works as any other family within a project. However, you can press Tab to toggle to the nested and shared components.

Selecting sub-instances of a shared family
If you select a nested instance, you can do the following:
 (Edit Type), and modify type properties. When you do this, all instances of that type also update to reflect the changes.
 (Edit Type), and modify type properties. When you do this, all instances of that type also update to reflect the changes. If you select a nested instance, you cannot do the following:
If you do this, the entire host family adapts, not just the nested instance.