Another important expressive technique is the glissando (gliss for short). This is simply a slide either to or away from a note. A gliss is usually done with the nail of the thumb, supported by the whole hand. On an organ, or electric keyboard, the side of the hand can often be used. Use the left hand when ascending and the right when descending. Get a teacher or experienced player to demonstrate it for you, as it can be painful if done incorrectly. The gliss is indicated by a wavy diagonal line leading either to a note or away from a note.