You can clip the display of a raster image in a drawing with a polygonal clipping boundary.
You can increase redrawing speed by clipping the image so that only the parts of the image that you want visible are displayed. You can define the part of an image that you want to display and plot by clipping the image. The clipping boundary can be a rectangle or a two-dimensional (2D) polygon with vertices within the boundaries of the image. Each instance of an image can only have one clipped boundary. Multiple instances of the same image can have different boundaries. You can change the boundary of a clipped image.
You can display a clipped image using the clipping boundary, or you can hide the clipping boundary to display the image with its original boundaries.
You can delete the clipped boundary of an image. When you delete a clipping boundary, the image is displayed with its original boundary.