Projection Mode

1. Click                     the right mouse button while in the 3D Orbit command
2. Choose                 perspective

                       Perspective view displays objects in perspective so that all parallel lines converge at one point. Objects appear to recede into the distance, and parts of the objects appear large and closer to you. The shapes are somewhat distorted when the object is very close. This view correlates more closely to what your eye sees.

                    Parallel view displays objects so that two parallel lines in a drawing never converge at a single point. The shapes in your drawing always remain the same and do not appear distorted when they are closer.

                        Perspective View                                                        Parallel View