To make a change, an adjustment can be made within this screen per field. A number of fields have a star in the description, which means that these fields are mandatory to fill in. The fields that do not have a star can be changed additionally. After you make changes, you can save them to change the complex. If there are already different relationships with this complex (for example, because there is a building on it and a floor has been installed in it with a room with a space to which an element is linked), then the change that is made to this complex is also carried through to the linked items.