Window > Hypergraph: Hierarchy

Opens a new Hypergraph window with the Scene Hierarchy option selected.

Also see:

Window > Hypergraph: Hierarchy >

Open Hypergraph

You have the following options:

Create new Hypergraph panel: Creates the specified Hypergraph type in a new panel.
Use the first one: Opens the Hypergraph in a new panel showing the first hierarchy view in the Hypergraph list.