Troubleshoot unexpected joint flipping with the IK solver

After FK animation, a joint chain may flip to an undesired position when you enable the IK solver (Animate > IK/FK Keys > Enable IK Solver). To undo the joint flipping and prevent it from occurring when you turn on Enable IK Solver, do the following:

1. In the Animation menu set (press F2), turn off Animate > IK/FK Keys > Enable IK Solver.

   This returns the joint chain to the position it had before flipping.

2. Select the IK handle, then select Skeleton > Set Preferred Angle.
3. Turn Animate > IK/FK Keys > Enable IK Solver back on.
4. Select Animate > IK/FK Keys > Set IK/FK Key.

   Continue using IK as desired.