Select a hillslope or some of its property from the DEM. Since hillslope are identified by channel links, if a numbering of links is available, it gives to any pixel draining into a given link the link number.
Eventually, one can select all the hillslope points which share the same link number, i.e. the points which belongs to the same hillslope. Another use of this application is to associate to any hillslope point its channel path length. In general, it labels any hillslope pixel with the channel quantity found in the position where the hillslope pixel drains.