Now, you will discover how to change between Perspective and Orthographic view. The steps are as follows:
Press 1, 8, 8, 4, and 4 on the NumPad to get a nice angle on the cube.
Press the 5 key on the NumPad.
Press it again.
Press the 5 key several times and observe how the view changes.
When you press the 5 key on the NumPad, the 3D View switches between Perspective and Orthographic views as in the previous illustration.
Now it's time to play. Using what you have learned about navigating in the 3D view, experiment by finding different angles to view the scene, and shifting between Perspective and Orthographic views and see how they compare. Be sure to try views like top, left, and, front, as well as use the 2, 4, 6, and 8 keys to gently rotate the scene. Otherwise, you can use your mouse if you wish.