Abstract: A variety of methods and devices providing for the angular and lateral adjustment of some types window shades is disclosed. As window openings often reveal a variety of geometric irregularities, several window covering systems, particularly roller type window shades, exhibit poor geometric fit within window openings. The present invention provides for variety of angular and lateral adjustments of shades in order to correct various defects of fit of those shades within window openings by controlling external and internal gaps relevant to the rolling process of the shade.One method disclosed, referred to as Procedure A, involves the reversal of the roller actuating mechanism from one side of the roller to the opposite end in a Hunter Douglas Silhouette shade. This reversal alters system of forces and moments acting on the shade assembly and brings desirable modifications in both lateral and angular position of the shade.