Apple Shake 4 - Manual (Page 565)

Chapter 20 Rotoscoping 565
3 Drag the selected points out, away from the shape’s edge. The farther you drag the
edge, the softer it becomes.
To reset a soft edge segment to the default hard edge:
1 Click the Edge Points or Any Points controls.
2 Right-click the edge point you want to reset, then choose Reset Softedge from the
shortcut menu.
To adjust both main and edge points at the same time:
1 Click the Group Points button.
2 Select one or more main shape points around the edge of the shape.
Note: In Group Points mode, you can neither select nor adjust edge points.
3 Adjust the selected main shape points.
The accompanying edge points are automatically adjusted to match your changes.