To promote a field, select the field and then click Promote on the toolbar.
To promote a table or query, select a field that belongs to the table or query, and then click Group by Table on the toolbar.
To demote a field, select the field and then click Demote on the toolbar.
Note When you demote a field, all other fields that belong to the group level get demoted as well.
When you click Promote , the selected control is moved to the next higher group level. To copy the field instead of moving it, press and hold the CTRL key when you click Promote on the toolbar.