When you have more vertical space in your home than you know what to do with, you may want to make all that airiness less noticeable. Large rooms with high ceilings can look elegant, but they can also appear cold and unwelcoming. To create a cozier atmosphere, try painting your ceiling a darker color than your walls. Avoid creating strong vertical lines with window treatments and wallpaper. To downplay the height of the room, think horizontal. Add a chair rail, use shorter window treatments and create strong horizontal influences with shelving and wall art groupings.