The Custom Groups node provides a mechanism for you to group system resources together in a single view.
Groups may be nested to create custom "topologies" of system resources.
Custom groups include the predefined groups All Partitions and All Objects and any user-defined groups that you created using the Manage Custom Groups task under the Configuration category in the taskpad. The All Partitions group includes all the partitions defined to all servers managed by the HMC. The All Objects group is a collection of all the managed servers, partitions, and frames.
These system-defined groups (All Partitions and All Objects) cannot be deleted. However, if you do not want All Partitions or All Objects displayed under Custom Groups, do the following:
You can use the Views menu on the table toolbar to display your preferred table column configuration. For more information, see Views menu.