Viewport alignment when scaling mode supports it. See ScaleMode.
Values
Left
Anchor Scene viewport horizontally to the left side of the window. When passed to verticalAlign it will be treated as Center.
Right
Anchor Scene viewport horizontally to the right side of the window. When passed to verticalAlign it will be treated as Center.
Center
Anchor to the center of the window.
Top
Anchor Scene viewport vertically to the top of the window. When passed to horizontalAlign it will be treated as Center.
Bottom
Anchor Scene viewport vertically to the bottom of the window. When passed to horizontalAlign it will be treated as Center.