Expand a group to view its contents. Collapse a group to hide its contents.
 button on the tool bar and choose Expand Groups in the drop-down menu.
 button on the tool bar and choose Expand Groups in the drop-down menu. 
                button on the tool bar and choose Collapse Groups in the drop-down menu.
 button on the tool bar and choose Collapse Groups in the drop-down menu. 
               To view a diagram consisting only of objects in a group, select the group and choose Navigate to Child Diagram in the right-click menu. To restore the full diagram, click the  button on the tool bar and choose Return to Parent in the drop-down menu.
 button on the tool bar and choose Return to Parent in the drop-down menu.