Never underestimate the powerful role of window treatments on your comfort, budget, and privacy. Whether you are endeavoring to reduce your energy bill, prevent outsiders from looking inside, or sleep better by letting less morning light in, window treatments are critical to achieving your desired results. But different treatments are suitable for different specific goals, and it’s critical that you understand all your options before you choose. It is thus worthwhile to familiarize yourself with all the features of window treatments, and that begins by understanding the difference between openness and opacity.