You can either select an existing object to designate as the new boundary, or specify
the points of a new boundary. The new boundary does not clip the old boundary, it
redefines it.

The following prompts are displayed.

Clipping Object

Specifies an object to act as a clipping boundary. Objects that are valid as clipping
boundaries include closed poly-lines, circles, ellipses, closed splines, and regions.

Polygonal

Draws a clipping boundary. You can draw line segments or arc segments by specifying
points. The following prompt is displayed:

The descriptions of the Next Point, Arc, Close, Length, and Undo options match the
descriptions of the corresponding options in the PLINE command.

Delete

Deletes the clipping boundary of a selected viewport. This option is available only
if the selected viewport has already been clipped. If you clip a viewport that has
been previously clipped, the original clipping boundary is deleted, and the new clipping
boundary is applied.