Matching Pairs Design Elements #1Online version Test your knowledge of the basic elements of hair design. by Rosalind Carter 1 Horizontal lines 2 single lines 3 parallel lines 4 directional lines 5 Contrasting lines 6 vertical lines 7 curved lines 8 Transitional lines 9 diagonal lines Lines with a definite forward or backward movement. Move in a circular or semi-circular direction. Often used to emphasize or minimize facial features. create width in a hairstyle. curved lines that are used to blend and soften horizontal or vertical lines. Repeating lines in a hairstyle. Used in the one-length hairstyle. horizontal and vertical lines that meet at a 90-degree angle. Create length and height in hair design.