The Named Selection Sets dialog, available from the Edit menu and the toolbar, is a modeless dialog that lets you create named selection sets or select objects to add to (or remove from) a selection set, directly from the viewport. The dialog also lets you organize your current named selection sets, browse their members, delete or create new sets, or identify which named selection sets a particular object belongs to.
To create a named selection:
(Create New Set).To add objects to a named selection set:
(Add Selected Objects).To remove objects from a named selection set:
Delete.To move an object from one set to another:
On the main toolbar, click Edit Named Selection Sets, or on the main menu, choose Edit > Manage Selection Sets.
In the Named Selection Sets dialog, expand the selection sets.
Drag an object from one set to another.
The object is moved into the second set. If you use Ctrl +drag, the object will be copied into the second set.
To select objects in a set:
(Select Objects In Set) to select all of the objects in the highlighted set.
In the Named Selection Sets dialog, all of the current named selection sets are displayed. By clicking the plus ( +) or minus ( -) icon, you can expand or collapse (respectively) the object list for each set.
The buttons along the top of the dialog let you create or delete sets, add or remove objects from a set, select objects (independently or as a selection set), and see which named selection set(s) a particular object belongs to.
Creates a new selection set, including any currently selected objects as members.
Removes the selected object or selection set.
Adds the currently selected objects to the selected named selection set.
Removes currently selected objects from the selected named selection set.
Selects all members of the current named selection.
Opens the Select From Scene dialog, where you can select a group of objects. The selected objects can then be added to or removed from any named selection set.
Highlights all of the named selection sets that contain the current scene selection.

Displays the current named selection set, as well as what’s currently selected in the scene. If more than one object is selected, the number of selected objects is displayed.
Additional commands are available when you right-click in the Named Selection Sets dialog.
Lets you rename the selected set or object.
F2.Removes the selected object or set and stores it in a buffer for reuse with the Paste command, similar to the Cut command in Windows.
Ctrl+X.Copies the selected object or set and stores it in a buffer for reuse with the Paste command, similar to the Copy command in Windows.
Ctrl+C.Adds a Cut or Copied object or set into another set.
Ctrl+V.Collapses all expanded selection sets.
Expands all collapsed selection sets.
Creates a new selection set, including any currently selected objects as members.
Removes the selected object or selection set.
Adds currently selected objects to the selected named selection set.
Removes currently selected objects from the selected named selection set.
Selects all members of the current named selection.
Opens the Select Objects dialog, and adds all objects selected there to the current named selection set.
Highlights all of the named selection sets that contain the current scene selection.
Cycles through selection sets containing the selected object, when used in collaboration with the Highlight Selected Objects command.
Ctrl+G to cycle through the sets.