Use the Side curvature tab to specify the parameters to be used when creating the side of the heel (shown in yellow on the diagram).
Use the sliders and buttons to adjust the heel parameters:
Select the button to straighten the side curves from the curve point downwards. The button changes to when selected.
Select the button to straighten the back of the heel from the curve point downwards. The button changes to when selected.
Select the button to straighten the front of the heel from the curve point downwards. The button changes to when selected.
Select this button to change the top point on the front curve, so that the front curve blends smoothly with the reference surface. The button changes to when selected.
Select this button to change the top point of the back curve, so that the back curve blends smoothly with the reference surface. The button changes to when selected.