 Hello, in this video we're going to apply the inverted polygon shape burst fill technique to highlight the study area, in our case the rule catchment. Let's go to the layer styling panel and change from single symbol to inverted polygons. Inverted polygons means that the style is applied to every area outside of the polygon. But we don't want a simple fill, we're going to change the simple fill to shape burst fill. And there we use the two-color method. We change the first color to a gray. With RGB, gray is a combination of values that are the same. So we use here 135, 135, 135 to get a nice gray shade. Use the arrow to go back and we change the second color to white, but with an opacity of 65%. Go back and change the shading style to set distance and change the distance to 4. Also increase the blur strength to 10. And here we already see the nice effect of how the study area is highlighted by shading the outside areas. But what we still miss is a line indicating the boundary of the polygon. So we can add a second style layer and to choose their outline, simple line. Now we see that a black line is added and we make the stroke width a bit wider to 0.46 millimeters. And here's the result. In this video you've learned to apply the inverted polygon shape burst fill technique to highlight the study area. As you see, this is much easier for visualization purposes than clipping the layer.