Why do X, Y, and Z properties not have bezier handles in the Motion Editor?
The X, Y, and Z properties control the position animations of your motion tweens, and are called spatial properties. These graphs control where your instance appears on Stage, and are used to generate the motion path on Stage. You can edit the motion path on the Stage to update the graphs in the Motion Editor, and vice versa. To enable stage editing of spatial properties, it is necessary for the properties to add keyframes to all graphs at the same time. If you change what frame a keyframe resides on, both keyframes move together. Because the motion model has a lot of control over the spatial property graphs, handles are not available on the property keyframes in these graphs because they’re controlled by Flash (you can hold Alt and change a control point between a corner and smooth point). You should try to edit your motion paths on Stage for the best results.
