VALENTINA ARC TOOL - Deepen Neckline

Click on the point that you’d like to have at the center of your arc, and the pop up appears where you can enter the dimensions you require. Radius is the distance from your center point (A), where I have used length of back neck curve plus 6cm (shoulder width narrows). The first angle is the start position where you'd like your curve to start. I have used 270 degrees but one can use the other angles like the angle between two lines. The second angle is the end position where you'd like your curve to end. I have used length of back neck curve plus 12cm (double the shoulder extension because as you deepen neck depth the shoulder width also narrows). Remember armhole length stays & does not change.