See Also: Alignment Members
The scale settings are used to specify how much the child widget should expand to fill the space allocated to the Alignment. The values can range from 0 (meaning the child doesn't expand at all) to 1 (meaning the child expands to fill all of the available space).
The alignment settings are used to position the child widget within the available area. The values range from 0 (top or left) to 1 (bottom or right). If the scale settings are both set to 1, (making the child expand), the alignment settings have no effect.