Manages user coordinate systems.

Controls the visibility and placement of the UCS icon.

Manages defined user coordinate systems.

Displays the number of the appropriate error code when an AutoLISP function call causes an error that AutoCAD detects.

Stores the name of the UCS that defines the origin and orientation of orthographic UCS settings in paper space only.

Generates a plan view whenever you change from one UCS to another.

Stores the name of the current coordinate system for the current viewport in the current space.

Stores the origin point of the current coordinate system for the current viewport in the current space.

Determines whether the related orthographic UCS setting is restored automatically when an orthographic view is restored.

Stores the X direction of the current UCS for the current viewport in the current space.

Stores the Y direction of the current UCS for the current viewport in the current space.