Returns the bottom edge of the visible screen. This includes any black border area so if there are black borders on the top and bottom of the display then this value will be greater than GetVirtualHeight. This represents the fact that the virtual height is the end of the visible area and the start of the black border, and the bottom bound is the end of the black border and the edge of the screen. If there is no black border on the bottom then the bottom bound will always be equal to GetVirtualHeight.
float GetScreenBoundsBottom()