Vector Cad is a nurbs based, 3D wire frame and surface design program with IGES, DXF, and STL file format compatibility. Vector Cad XT has a noteworthy sketching capability that combines ease of operation with the high precision needed for mechanical part design. Shaded surface rendering is accomplished directly on the active geometry window. Modeling may be done with a wire frame or rendered image. Boolean selection filters and ample control over color, layer, line style, and weight attributes provide a powerful tool with a simple interface. Additional features include multiple undo, repeat last command, pick and match, copy-paste attributes or entities, dynamic rotation and single click view angle selection.