Choose the Expand submenu to expand an object's children,
  attributes, access control list (ACL), group or class
  membership list, or all of the above options.

  Expand operates on whatever type of view is current.
  To display an option, follow these steps:

  1. Click on the desired object (for instance, a group).
  2. Pull down the View menu.
  3. Pull down the Expand submenu.
  4. Choose the Children, Attributes, ACLs, Membership,
     or All menu item.