EXPUCS command
Creates, renames and deletes named UCS's trough the Drawing explorer dialog box.
            Alias: DDUCS, UC
Description
Opens the Drawing explorer dialog box on the Coordinate systems category:
         Options within the command
- Current
 - 
                     
Indicates the current UCS.
 
- UCS Name
 - 
                     
Lists the names of UCS's in the drawing; click to rename.
 
- Origin (WCS)
 - 
                     
Reports the origin (0,0,0) of the UCS in x,y,z coordinates of the WCS; cannot be edited.
 
- X Axis Direction (WCS)
 - 
                     
Reports the direction of the x axis in WCS coordinates.
Note: Cannot be edited. 
- Y Axis Direction (WCS)
 - 
                     
Reports the direction of the y axis in WCS coordinates.
Note: Cannot be edited. 
Context Menu Options
- New
 - Creates additional UCS into the drawing trough the model space.
 
- Delete
 - Deletes Coordinate system from the drawing. The World coordinate system definitions cannot be deleted.
 
- Rename
 - Renames the Coordinate System.
 
- Select All
 - Selects all Coordinate System definitions.
 
- Invert selection
 - Deselects the current selection and vice versa.
 
- Set current
 - Sets the selected Coordinate System as current.