Suggested placement for tiebacks…
Sill-Length: floor-length curtains or drapes fall into graceful curves if the tiebacks are placed at the height of the window sill.
Placed Low: by placing tiebacks low (about 2/3 of the way down from the top of the curtains), an illusion of a tall, narrow window is created. This effect will obscure light because more of the window is covered by the curtains.
Placed High: to create an illusion of height, place the tiebacks about 1/3 of the way down from the top. This effect will also let in the most light.