Invert is a boolean property that applies to the following Layers:
Region Layer <layer_region>Outline Layer <layer_outline>Cicle Layer <layer_circle>Polygon Layer <layer_polygon>Rectangle Layer <layer_rectangle>Star Layer <layer_star>Text Layer <layer_text>
This parameter inverts the filling of the shape to the outside part of its contour when checked on. Its default value is checked off (shape looks as usual).
A sample of Invert Parameter set to off:
A sample of Invert Parameter set to on:
