Toggle for whether or not to tile a background across a view.
Setting this to
true makes the set
backgroundImage repeat across
the view as a series of tiles. The tiling is begins in the upper-left
corner, where the upper-left corner of the background image is rendered.
The image is then tiled to fill the available space of the view.
Note that setting this to
true may incur performance penalties for
large views or background images, as the tiling must be redone
whenever a view is resized.