When you add a motion point and change its position on a tweened motion path, the motion path curves towards that point, reshaping the entire motion path. By default, the line has a gentle curve on either side of the control point.
You can use the Tension, Bias, and Continuity sliders in the Motion Point tab to adjust the amount of curve on either side of a motion point, further customizing the segments of the motion path.
You can adjust each point individually in your motion path, but if you press [Shift] while dragging the slider, the selected value applies to all the peg points. By default, each value starts at 0.0, but you can change the default value.
Tension: controls how sharply the path bends as it pass through a motion point.
Continuity: controls the smoothness of a transition between the segments joined by a point.
Bias: controls the slope of the path so that it flows towards one side of the motion point or the other.
See Also
Adding Keyframes for Motion, Rotation, Skewing and Scaling
Tweening Motion or Maintaining Constant Values Between Keyframes
Defining the Default Tension, Continuity and Bias Values
Adding Motion Points to a Motion Path
Moving Motion Points with the Motion Point Tab
Creating a FB Motion Path
Creating a NS or EW Motion Path
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