About Defining a Parallel Projection

You can define a parallel projection.

To determine the point or angle in model space, you can

Viewing in 3D is available only in model space. If you are working in paper space, you cannot use 3D viewing commands such as VPOINT or PLAN to define paper space views. The view in paper space is always a plan view. Use the PERSPECTIVE system variable to turn off perspective views in drawings created in AutoCAD.