Heel:
None: No treatment is applied on the heel vertical edges.
Fillet: Allows you to create a fillet with the wanted value, applied on the heel vertical edges.
Chamfer: Allows you to create a chamfer with the wanted value, applied on the heel vertical edges.
Process:
None: No treatment is applied on the heel process vertical edges.
Fillet: Allows you to create a fillet with the wanted value, applied on the heel process vertical edges.