Previously, the compartment explorer allowed you to view all resources in a selected compartment. The enhancement added today allows you to also view all the resources in the subcompartments of the selected compartment. To support this added functionality, the results list in the compartment explorer now shows you the compartment hierarchy of a listed resource, so you can know where the resource resides within the compartment structure. Viewing all resources in subcompartments is an option that you can toggle on and off.
For more information, see Viewing All Resources in a Compartment.