A couple of utilities help you manage the polygon count for scenes and animations that must not become too complex. Show Statistics, available from the viewport right-click menu, lets you monitor the number of polygons, vertices, etc., in the scene, as well as the frames per second displayed. The Level of Detail utility, available from the Utilities panel, lets you manage the complexity of an object in the scene. For example, Level of Detail enables you to display a complex object as simple geometry when the object is at a distance from the camera.