1. Measure directly up from the dart point the amount you wish to lengthen the dart. Mark the new dart point. 2. Draw new dart legs starting at the ends of the original darts and ending at the raised dart point The broken lines in diagram shown represent the original darts; the solid lines, the new darts. HOW MUCH? Here is a guide for shortening designer's darts to convert them into dressmaker's darts. Keep in mind that "standards" may be meaningless when applied to individual requirements. Shorten the darts the amount that looks best and feels . . .