Crop Image
This command is used to clean up an image. Everything in the image
to the outside of crop area is wiped out using the specified
Background Color. The area is defined either by picking a window or
selecting closed inclusion polylines. The Resize New Image option
will make the image file smaller to remove the cropped out area.
Warning: this command will update the image seen on the screen as
well as the source Image.
Pulldown Menu Location: Raster
Keyboard Command: rascrop
Prerequisite: an Image and a closed polyline