Maintaining groups and undoing groups
To group selected objects, right-click and choose Group from the pop-up menu. You can also use the keyboard shortcut Control+Shift+G or choose Modify > Group from the menu bar.
When objects are grouped, any editing operations carried out on that group are applied to all members of the group. If you click on one member of the group, the whole group is selected.
The objects of a group retain their own individual properties. To undo a group, right-click and choose Ungroup from the pop-up menu, use the keyboard shortcut Control+Alt+Shift+G or choose Modify > Ungroup from the menu bar.
You can edit a member of a group individually without breaking the group. To do this, right-click and choose Enter group or double-click on the group.