A retractable covering such as a door or window blind or shade has a top rail, a bottom rail, a covering material extending between the top rail and the bottom rail, at least two lift cords extending downwardly from the head rail to the bottom rail for supporting the bottom rail, a covering operating system for enabling retraction and deployment of the covering, and an adjuster connected to at least two of the lift cords. The adjuster is preferably mounted in the bottom rail. The retractable covering also comprises an individual cord tensioner for allowing at least one of the lift cords to be individually tensioned. The individual cord tensioner operates independently of the adjuster. A method of adjusting the orientation and drop height of the bottom rail of the retractable covering is also provided.