Values
Individual Edges
The top edge of the view.
The leading edge (left in left-to-right languages, right in right-to-left languages).
The bottom edge of the view.
The trailing edge (right in left-to-right languages, left in right-to-left languages).
Edge Groups
Both leading and trailing edges (left and right sides).
Both top and bottom edges.
All four edges (top, leading, bottom, trailing).
