A rectangular overlay that contains text.

Initialize	Initializes the overlay with a position of (0, 0), a width of 100 pixels, and a height of 50 pixels. The Graphics Font that defines how text is drawn.
InitializeWithPositionSize	Initializes the overlay with the specified position and size.
InitializeWithWidthHeightUnits	Initializes the overlay with the specified position and size.
InitializeWithXYWidthHeight	Initializes the overlay with the specified x position, y position, width, and height, all specified in pixels.