"Creates a polygonal area that masks underlying objects with the current background color. This area is bounded by the wipeout frame. You can turn on the wipeout frame for editing and turn it off for plotting.
Specify first point or [Frames/Polyline]<Polyline>: Specify a point or an option
Determines the polygonal boundary of the wipeout object from a series of points.
Next point: Specify the next point or press ENTER to exit
Determines whether the edges of all wipeout objects are displayed or hidden.
Enter mode [ON/OFF]:<varies> Enter on or off
Enter on to display all wipeout frames. Enter off to suppress the display of all wipeout frames.
Determines the polygonal boundary of the wipeout objects from a selected polyline.
Select a closed polyline: Use an object selection method to select a closed polyline
Erase polyline? [Yes/No]<N>: Enter y or n
Enter y to erase the polyline that was used to create the wipeout object. Enter n to retain the polyline."