You must set flexibility before you perform a manipulation or a dragging operation. Flexibility settings cannot be changed on the fly.

The manikin_flexibility configuration option sets the level of the model's flexibility for dragging. The manikin becomes flexible when the configuration option is set to full (all manikin segments are free), or to partial (the manikin's finger segments are locked and are treated as a single unit). This flexibility ensures that a selected posture is fully and quickly applied.