Changes

The spacing property specifies the distance (in points) between the edges of adjacent subviews within a stack view. When the stack view distribution property is set to FillProportionally the spacing value dictates the spacing between the subviews. In EqualSpacing and EqualCentering modes, the spacing value indicates the minimum allowed spacing between the adjacent edges of the subviews. A negative spacing value causes subviews to overlap.

=== alignment ===