Click on item presents options Details, Show in Tree, Delete, Edit, Move, Fit and Export Outline.
Please note that if an items are placed in this area - the delete will not be available.
On the Building details form you can rename the Building at anytime.
On the Building Edit; move the boundary outline until the desired edit.
Ensure you click the Complete button to save the Edit change.
On the Building Move; you can drag the whole boundary, with or without the items placed within.