Adobe Flash Professional CS6 Adobe Flash Professional CS6 Classroom In A Book | Page 181

7 In the Properties inspector, select the Constrain option in the Joint:
Rotation section.
An angle indicator appears on the joint, showing the minimum and maximum
allowable angles and the current position of the node.
8 Set the minimum joint rotation angle to 0 degrees and the maximum joint
rotation angle to 90 degrees.
The angle indicator changes on the joint, showing the allowable angles. In this
example, the second segment of the crane can only bend downward or rise up
to be level with the horizon.
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Lesson 5
Articulated Motion and Morphing