Displays an orthographic view of the XY plane of a specified user coordinate system.
The following options are displayed.
Generates a plan view in the current viewport relative to the XY plane of the current UCS.
Generates a plan view of a previously saved UCS.
Generates a plan view of the World Coordinate System. The World Coordinate System (WCS) is a fixed coordinate system that defines the location of all objects in a drawing. By default, the UCS is coincident with the WCS.