Adobe Flash Professional CS6 Adobe Flash Professional CS6 Classroom In A Book | Page 182

9 Click on the third bone in the crane armature.
The bone becomes highlighted, indicating that it is selected.
10 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.
11 Set the minimum joint rotation angle to -90 degrees and the maximum joint
rotation angle to 0 degrees.
The angle indicator changes on the joint, showing the allowable angles. In this
example, the third segment of the crane can bend only from a level position to a
vertical position. Each joint in an armature can have its own rotation constraints.
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