Abstract: A system, including apparatus and method, for modifying an existing venetian blind so as to maintain a desired portion of the slats in an open or horizontal position, while simultaneously maintaining the remaining portion of slats in a closed or slanted position. The invention provides for a clip and a method of using the same, the clip being attached to one tilt string and the lift string of the blind to prevent movement of both relative to each other below the clip. The second tilt string of the blind is encompassed loosely by the clip, but remains free to move vertically up and down.