The way in which all the visual elements within a painting are put together is known as composition. The factors that govern composition include shape, scale, perspective, colour and texture. The purpose of composition is to manipulate and lead the eye while finding a pleasing visual balance of all these elements. Balance does not mean visual symmetry: shape can be offset with texture or colour with scale. Composition can also be used to create mood. A composition can evoke feelings of heaviness and oppression, or be airy, light and uplifting. There are certain rules to composition, but breaking these rules often gives a work a certain edge that can lift it from the mundane and pedestrian into something much more eyecatching.