Solfége is a musical method used to teach sight-singing by labeling each note of a scale with a syllable and hand-sign, covering the visual, auditory and kinesthetic levels. The method is believed to originate from the syllables "Sol" and "Fa" used to sing scales. Zoltán Kodály popularized the method in the early 20th century as part of the Kodály Method. Each note of the major scale has a specific hand-sign position starting at belly-button level for Do and ending at forehead level for Do'. The half-step transitions between notes are indicated by the finger pointing the direction of the leading tone.