Fortunately, many manufacturers offer window coverings that work well in these specialty shapes. Pleated shades and cellular shades look dramatic in an arched window or circular window. They also work well in a skylight, with a motorized control for easy raising and lowering. Horizontal and vertical blinds are good choices for angled windows, since they can be operated so easily in this unusual shape. Work with your independent retailer to determine which window covering is best suited to your unique window needs.