Use Coordinates and Coordinate Systems (UCS)
For precise coordinate input, you can use several coordinate system entry methods. You can also use a movable coordinate system, the user coordinate system (UCS), for convenient coordinate entry and to establish workplanes.
Absolute and relative 2D Cartesian and polar coordinates determine precise locations of objects in a drawing.
Cartesian, cylindrical, or spherical coordinates locate points when you are creating objects in 3D.
You can relocate and rotate the user coordinate system for convenient coordinate entry, grid display, grid snap, Ortho mode, and other drawing tools.
Control of the user coordinate system is essential for effective 3D modeling.
To facilitate editing objects in different views, you can define a different user coordinate system orientation for each view.
To help visualize the current orientation of the user coordinate system, you can display the user coordinate system icon. Several versions of this icon are available, and you can change its size, location, and color.
