This diagram shows a reference area, with all edges labeled: space-start, border-start and padding-start to the left, space-end, border-end and padding-end to the right, space-before, border-before and padding-before at the top, space-after, border-after and padding-after at the bottom. start-indent is shown, spanning space, border and padding on the left, as well as end-indent, spanning space, border and padding on the right.