Clips layout viewport objects and reshapes the viewport border.

Button
Ribbon: View tab
Viewports
panel
ClipNot available on the ribbon
in the current workspaceYou 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.
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.