The following table describes the Group menu items.
To edit a group after it has been created, use the Dive Group operation. The members of the group can be individually selected; elements outside the group are unselectable.To remove an element from a group, dive into the group, cut the element, surface from the group, then paste the element. Regroups the selected elements after a Dive Group operation. Top Surface Group Regroups all the groups at all levels of the group structure. Because you can have groups within groups, you can dive several layers into the group structure. Top Group is a short-cut for selecting Surface Group several times.