Margins represent the amount of fixedspace between the edge of a control and the edge of a window.
边距表示控件的边缘与窗口的边缘之间的固定空间大小。
2
I'm ok with the top button either being a fixedspace from the top edge or a proportional space from the top edge, likewise for the bottom button and the bottom edge.
I stumble around in this infinite space where messages circulate freely without fixed destination, while the whole of it remains forever beyond my comprehension.