Luffing means steering towards the wind, this is, windward, holding the board close to the wind. The centre of the sail must be tilted backwards –tilting the rig towards the tail while keeping moderate pressure on the sail with the back hand– until reaching the desired course, for example, changing from broad reach to beam reach or from beam reach to close hauled. Once the steering is done, the rig must be placed again at the initial position, so the board stops steering and sails straightforward again.
The rig must be tilted backwards, lowering the rear of the boom. Lowering the clew implies luffing (holding the board closer to the wind).