I managed to get my figure's arm to go down without too much distortion. The arm still can't go straight up without breaking which was a concern until I tried to do that myself--not humanly possible. I’m hoping there will be another way to get there before I'm through... One thing I never actually used before and wonder about are these extensions that become visible when you call up the joint editor. Put your cursor over the ends and the ‘target’ icon appears and you can reposition them. How is this actually used when rigging? Could someone explain the intended purpose?

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