When animating, you can use the Motion Editor to control the shape of each property curve of a tween, except for the x, y, and z axes. By working with property curves directly, you can add complex curves to create specific tween effects.

Control points of property curves can be either smooth points or corner points. When a property curve passes through a corner point, it forms an angle. When a property curve passes through a smooth point, it forms a smooth curve.

Select a property keyframe and then press Alt-click (Windows) or Command-click (Mac) on the control point to toggle a control point between a corner point and a smooth point.

When a control point is in smooth-point mode, Bézier handles are exposed and the property curve passes through the point as a smooth curve. When a control point is a corner point, the property curve forms an angle when it passes through the control point. Bézier handles are not exposed for corner points.

To set the point to a specific point mode, right-click (Windows) or Command-click (Mac) on the control point and choose Corner Point, Smooth Point, Smooth Right, or Smooth Left from the context menu that appears.