Select a rig bone. >
Modify panel > Setup rollout > Add Bone
Exta bones are bones
you can add to any bone in 3ds Max CAT for any reason. You can use
extra bones for armor, breathing and facial animation, weapons,
walking sticks, and so on.
Procedure
To add an extra bone:
Select the hub or bone to which to add
the bone.
Do either of the following:
On the Modify panel > Bone Setup rollout,
click Add Bone.
Right-click the bone or hub in the viewport,
and from the Tools 2 quadrant choose Add Extra Bone.
