There are many different shapes and sizes of windows, and some present more of a challenge than others when it comes to treating them. With any window, you first need to know what you are trying to accomplish - adding softness and pattern to a room, framing a view, providing privacy or light control or all of the above! Transom windows, arched windows, Palladian windows, dormers and cathedral ceilings and unusual rooflines all add to the conundrum.