Commissioning a lighting system is disclosed. A user can be provided with a pointing device capable of emitting or returning a signal which can be received by detectors co-located with each fixture in the lighting system. The user can add a fixture to a group by aiming the pointing device at the fixture when the fixture is not assigned to the group, and the user can remove a fixture from a group in the same way when the fixture was previously assigned to the group. Additional user gestures are also disclosed.