A window can contain:
Each view can be from any direction, at any scale, and can be parallel, isometric or perspective projections. Surfaces can be shown as wireframe or shaded and objects can be blanked from specific views to reduce clutter.
To change the view and appearance of a model:
Quick Rotation allows rotation of the selected object when you hold down the R on the keyboard and scroll the mouse-wheel. The object is rotated about its principal axis by 1 degree for each notch on the mouse-wheel.