 Hello, in this video we're going to clip the channels and the DEM to the catchment boundary polygon. Let's start with the channels, go to Vector, Geoprocessing Tools, Clip. Choose as an input layer the channels and as an overlay layer the Root Catchment Boundary Polygon. It's good practice to have these layers in the same projection. I choose an output layer Root Channels shapefile and run the algorithm. Let's look at the result. I move the Clipped Channels to the top and I also want them in the same style as the original so I copy and paste the style to the Clip layer. And here we see the result. Now we're going to clip the DEM to the catchment boundary polygon. Go to the Raster menu, choose Extraction, Clip Raster by Mask Layer. As an input layer we choose the DEM. For the Mask Layer we choose the Root Catchment. Make sure that they are in the same projection as good practice. Because we need to fill all the pixels outside of the boundary in the rectangular raster with no data, we define a no data value of minus 9999 which is a convention for out of range values. And we check the box to keep the original raster resolution. Save the output as RoarDem and I make it a GeoTiff. Here we see the result of the Clipped DEM. I also copy the style of the original DEM and paste it to the Clipped one. Now I can see the Clip DEM but the HillShade is still covering the larger area. So I can do the same trick to duplicate the Clip DEM and change the copy to the HillShade Renderer. So also only the Clipped part is rendered as a HillShade and then I hide the original HillShade layer. See that there's still some blending on so I remove the blending from the HillShade layer. And there we have our Clip DEM with the color HillShade.