Windows of visualization Front, Right and Top

The Three Views:

The usefullness of these windows is in showing one simple diagram of the Scene... Now I will show a case in which a simple perspective window cannot be enough: we take one sphere and one cone, before glanced at is not possible to know how much distance separates the two objects, or how much is large the cone regarding the sphere, for this and for other cases are recommend the views Front, Right and Top.