The below steps are detailed for the V7.0 version. If you are using V6.0, the steps will be slightly different.
rectangle tool, left click desired location , drag the mouse to draw rectangle then you can view the rectangle and enter the values on your need.After you finish entered the value, you can cilck the blank position or press the “Enter” key to confirm the drawing.
Curve tool to curve the neck line and armhole.NOTE: If the curve is not smooth enough, pls add more points on the curve by using Add Point Tool to adjust curve.