Create a polygonal area, called a wipeout to mask underlying objects with the current background color.
A wipeout object covers existing objects with a blank area to make room for notes or to mask details. This area is defined by the wipeout frame, which you can turn on for editing, and turn off for plotting.
Use the WIPEOUT command both for creating a wipeout object, and for controlling whether wipeout frames are displayed or hidden in the drawing.
If a polyline is used to create a wipeout object, the polyline must be closed, contain line segments only, and have zero width.
Use Wipeout Objects on a Layout
You can create wipeout objects on a layout in paper space to mask objects in model space. However, in the Page Settings dialog box, under Plot Options, the Plot Paper Space Last option must be cleared before you plot to ensure that the wipeout object is plotted correctly.
