Absolute/Relative Layout

The position type of an element defines how it is positioned within its parent.

RELATIVE (DEFAULT) By default an element is positioned relatively. This means an element is positioned according to the normal flow of the layout, and then offset relative to that position based on the values of top, right, bottom, and left. The offset does not affect the position of any sibling or parent elements.

ABSOLUTE When positioned absolutely an element doesn't take part in the normal layout flow. It is instead laid out independent of its siblings. The position is determined based on the top, right, bottom, and left values.

The position values top, right, bottom, and left behave differently depending on the position type of the element. For a relative element they offset the position of the element in the direction specified. For absolute element though these properties specify the offset of the element's side from the same side on the parent.