The angle and length of the wing determine the curvature of the segments on either side of the anchor point. The longer the wing, the deeper the curve.
The result of moving a wing depends on whether the anchor point is defined as a smooth point or a corner point. Two connecting curves (or straight lines) share one anchor point, which can be a smooth or corner point. The wings on smooth and corner points behave differently.
When you drag the handle on one wing of a smooth point, the curves on both sides of the point change. With a smooth point, you adjust the angle of the wings concurrently.
A corner point is converted to a smooth point.
When you drag the handle on one wing of a corner point, only the curve on that side of the point changes. With a corner point, you can adjust the angle of the wings independently.
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