Is there anywhere to adjust the smoothing amount when applying to a polygon?
If not could this be a request to add this as a function.
If you mean smoothing the corners, you would not use the polygon tool, use the Curve (Bezier) tool and when you click the end of the next line, keep the mouse down and pull slightly to curve it and make the adjustment handles. When you've completed the shape, use the handles to adjust to your liking.
OK, got it.