The Edge Softness slider comes in handy if you want to add more sharpness to a rocky landscape, or perhaps soften the edges for a portrait.The Edge Shift slider shifts the mask edge in either direction.The Foreground Recovery slider revives the color of your foreground in weaker or more transparent areas. This can be a great tool for fur, whiskers, or wispy hair.The Defringe slider desaturates the edges of your mask to help with color contamination and bleeding.