If 4-Axis turning is available in the current workcell, the Head 1, Head 2, Head 3, and Head 4 options allow you to specify which head is to be used for the NC sequence (HEAD 1 is the default).

You can synchronize CL output of NC sequences created using Head1 with NC sequences performed on Head2 by using Synchronize on the mini toolbar.

If you perform 4 Axis Area turning, the HEAD 1, Head 2, Head 3, and Head 4 options are grayed out, because the system will automatically use both heads for this NC sequence.