ABSTRACT
This chapter aims to show in examples the methods of manipulating 3D models in 3D space using the User Coordinate System (UCS) tools from the View/Coordinates panel or from the command line. When constructing 3D model drawings, they have been constructed on the AutoCAD 2020 coordinate system, which is based upon three planes: XY Plane, XZ Plane, and YZ Plane. The XY plane is the basic user coordinate system (UCS) plane, which in terms of the UCS is known as the *WORLD* plane. The UCS allows the operator to place the AutoCAD coordinate system in any position in 3D space using a variety of UCS tools. The UCS icon indicates the directions in which the three coordinate axes X, Y and Z lie in the AutoCAD drawing. The shape of the icon can be varied when changes are made in the UCS Icon dialog but also according to whether the AutoCAD drawing area is in 2D, 3D or Paper Space.
