You set up the butterfly lighting as described above–that is, directly behind and above your camera–and you add a reflector.
This technique is just the butterfly technique with a reflector. You set up the butterfly lighting as described above–that is, directly behind and above your camera–and you add a reflector. The reflector should be placed in the subject’s lap (they will have to hold it in place), and it will serve to reflect some of that light back up as a fill light.