When used in this way lines are referred to as leading lines because they are selected or arranged to lead the viewer's eyes into the frame, generally to the scene's center of interest. In addition to moving our eyes around the frame, lines can suggest meaning in themselves. Straight, vertical lines suggest dignity, strength, power, formality, height and restriction. Horizontal lines suggest stability and openness. Diagonal lines can impart a dynamic and exciting look.
Curved lines suggest grace, beauty, elegance, movement, and sensuality.
As shown in these two illustrations, the S-curve is particularly effective in gracefully leading the eye to a center of interest. In contrast to curved lines, sharp jagged lines connote violence or destruction, and broken lines suggest discontinuity. Frame Central Subject Matter 9 . By putting objects at one or more edges of the picture, a shot can be framed. Framing a scene holds attention within the shot and keeps viewers' attention from wandering or being distracted from the center of interest.