Time for action — seeing the bottom view, rear view, and left side view
Sometimes you also need to look at an object or scene from the bottom, from behind or from the left. These keys will help you:
Press the Ctrl key, and the 7 key on the Numpad.
Press the Ctrl key, and the 1 key on the Numpad.
Press the Ctrl key, and the 3 key on the Numpad
Now, alternate pressing the 1, 3, and 7 keys on the Numpad, and pressing them with the Ctrl key depressed.
What just happened?
You know to use the 1, 3, and 7 keys on the Numpad to change views. To see from the opposing angle of a view, you press the Ctrl key and the number for the view on the Numpad. Ctrl+7 shows the bottom view. Ctrl+1 shows the back view and Ctrl+3 shows the left side view.