(Copied from original User Voice forum)
"Switching between IK and FK is easy but problematic. In Motionbuilder, the same process has a matching button, could we please have this too?
Also, when a limb is in IK, could we disable FK functionality. I love this feature but, by allowing keys to be set on both rigs, things break. Ideally, it would be great to use both FK and IK for positioning but only allow keys to be set on the currently active rig. Otherwise, it seems safer to treat the switching between IK & FK as exclusive modes
* Note: this does not apply to selection mode, only full body and body part."