Controls attributes of a symmetry map. Symmetry maps establish correspondence between points on either side of a geometrical object for symmetrical manipulation.
To apply: Select an object and choose Get Property Symmetry Map from any toolbar.
To redisplay: Select the object, click the Selection button on the Select panel, expand the Clusters\SymmetryMapCls node, then click the symmetry map's icon (by default named Symmetry_Map).