When opening those vertical blinds which can admit light by sliding to one side or twisting in place, two problems occur.
The first is that the cords for the two functions tangle. Yuk.
The second is that no-one can tell which to pull on to achieve the option they want.
Today’s invention is therefore a clip-on sheath for the cords, one for each pair. These keep all the cords from getting knotted and still allow free movement by pulling them. Each sheath carries a clear diagram indicating which set does which.
The two sheaths might even clip together to keep the whole package as visually unintrusive as possible.