For use by composers and arrangers. A particularly useful aid to teachers and students of Orchestration. New violin, viola, and cello precision fingerboard drawings (with frets, note-names and natural harmonics labeled) allow user, without years of practice on an instrument, to test passages by simulated playing. Drawings may be mounted on cardboard or other inflexible material and placed in playing position. Complete instructions are included. Used by many prominent composers and arrangers.