Orthographic views are the foundation of engineering drawing. A 3D object is projected perpendicularly onto a plane so that depth is removed. The resulting view shows the object as it would appear to an infinitely distant viewer. By convention, drawings include front, top, and side views (sometimes back and bottom too) arranged in third-angle projection (the standard in Australia, the US, and Canada) or first-angle (Europe and most of the rest of the world).
Orthographic views get dimensioned with extension and dimension lines that measure from feature to feature in the plane of the view. A complete drawing pack normally carries at least three orthographic views plus an isometric to help the reader visualise the part in 3D.
CAD60 generates front, side, and top orthographic views from the 3D solid. Computed, not sketched.