Unlike traditional windows, window frames have their hinges on the side. That difference in design can reduce the number of decorating options you have available, as traditional curtains and blinds designed for traditional windows do not work in the folding variety. Crank each casement window opened to determine if it opens to the inside or outside of the house. Some casement windows open inwards, while others open onto the outside of the house.
Check your window frames to see if they use a modern double-pane design. If so, you can choose from a variety of treatments and casement window decorations, including awnings and blinds that fit between the glass. This type of decoration can look very elegant, and awnings and dyes can also make the most energy efficient window.
Fit a sheer panel to the top of the window frame if your casement window curtain opens into the house. Pick a color and style that matches the overall decor of the room. Measure the length of the frame window and choose a variety of scarves, decorative cloth and other items that can be mounted on the top of the window frame. These decorative elements move with the window when it opens and closes, creating an attractive effect.