Time for action – refining the use of the Bézier curve handles
Ironically, you can sometimes get more control by restricting the motion. You'll try limiting the motion of the control handles to a particular axis, and you will set the control point so that only one control handle moves at a time:
In Graph Editor, zoom into the keyframe on frame 19 where you stretched the cube, select one of the handles with the RMB, press the G key to grab it, and move it around with the mouse. Tap the Y key. Move the cursor around and observe how this affects the movement.
Press the X key. Move the cursor around and observe how this affects the movement. Press the RMB to release the curve handle without making a change.
Now, select the control point in the center of the control handle.
Press the V key. Select Free from the drop-down menu, as shown in the following screenshot. Pick one of the control handles and move the cursor around and observe how this affects the curve.
What just happened?
You discovered...