aConvert edge loop to curves

Hello, I am not a complete newbie in the sculpture of the nomad. When it comes to detailing it is very painful. I want to ask you to add a function to convert the edge of a set of faces, or masked edges of areas, or the edge of extracted islands of polygons into broken curves. That is, looped edges into curves. So as not to draw them again trying to frame the area of ​​the curve. I think this is not difficult to implement, and it will be very useful. I work on iPad.