Source image for text label background.
[number, number, number, number]
Sets the space in pixels between the label text box and the edge of the stretched image for all four sides [top, right, bottom, left], like in CSS. [0, 0, 0, 0] by default.
The ratio of logical pixels in the image to physical pixels on the screen.
[width, height] — image size in logical pixels
Defines the parts of the image that can be stretched horizontally.
Defines the parts of the image that can be stretched vertically.
Source image URL.