Unsupported easing curves

Certain types of easing curves are not supported. No part of the graph can represent a nonlinear curve (such as a circle).

The Custom Ease dialog box automatically prevents moving a control point or a tangent handle to a position that would render an invalid curve:

• All points must exist on the graph. Control points cannot be moved beyond the bounds of the graph.

• All segments of the curve must exist within the graph. The shape of the curve is flattened to prevent it from extending beyond the bounds of the graph.