A method for manufacturing a window covering for an architectural opening is disclosed. The covering including a support, at least one vane, and at least one operating element. The method for manufacturing the covering includes extending the vane across the support; extending the operating element along a length of the support, and coupling the covering to a roller for selective rotative movement for extending and retracting the covering during use. The operating element being movable with respect to the support. In use, an upper portion of the vane is fixed with respect to the support while a lower portion of the vane is fixed with respect to the operating element so that the lower portion of the vane is movable relative to the upper portion by moving the at least one operating element.