This International Standard specifies symbols for use in copy preparation and proof correction. It is applicable to texts submitted for correction whatever their nature or their presentation (manuscripts, typescripts, printers' proofs, etc.) and for marking-up copy for all methods of composition. Symbols for the correction of mathematical texts and colour illustrations are excluded. This International Standard does not apply to symbols used in certain fields of activity of graphic art, for example photo-engraving plants, where additional symbols relevant to that particular field of activity may be used.