I animated a model via pose mode and the Dope Sheet. All was good. Then I decided to add a bone. I added the bone by extruding from an existing bone and all was good. My weight paint appears good as I can move the body part (chin) that I want to move however I cant keyframe the animation because the bone isnt listed in the Dope Sheet. How does one add or subtract a deleted bone from the Dope Sheet?