Symmetry Symmetry occurs when both halves of a design are more or less similar. Essentially, there are two types of symmetry. Rotational symmetry occurs when elements appear to rotate out from the center. This type of symmetry can be rather dynamic, but it is harder to employ effectively. Bilateral symmetry, the most common type of symmetry used for slides, is achieved by arranging the left and right sides of a visual to be virtually identical. This kind of symmetry evokes feelings of stability and formality, an effect that may be desirable.
