A variable length support rod apparatus for translational support of a window treatment,such as draperies, comprising: a support member having a length defined by a distance between a first end and a second end of said support member; said support member formed of a plurality of segments (14, 16), each said segment (14, 16) in a translational engagement with an adjacent said segment (14, 16); said support member configurable to a minimum said length through a translation of said segments (14, 16) toward each other to a fully contracted configuration; said support member configurable to a maximum said length through a translation of said segments (14, 16) away from each other to a fully extended configuration; said length of said support member being infinitely variable between said minimum length and said maximum length; a continuous flexible member positioned along a member pathway running between said first end and second end of said support member; characterized in that a first portion of said flexible member extending a first length, in-between said first end and said second end of said support member; a second portion of said flexible member extending a second length, in between said second end of said support member and a movable return located in a central portion of said support member; said moveable return being at a movable position relative to said second end of said support rod during; said moveable position providing means for decreasing said second length of said second portion of said flexible member and a concurrent increasing of said first length of said first portion of said flexible member, during any increase of said length of said support rod; said moveable position providing means for increasing said second length of said second portion of said flexible member and a concurrent decreasing of said first length of said first portion of said flexible member, during any decrease of said length of said support rod; translation of said first portion of said flexible member providing means for a translation of a window treatment adapted for support by said support rod; and whereby said support rod may be configured to any said length between said minimum and said maximum length of said support rod, and fixed to a support surface without an adjustment of a fixed length of said flexible member. a support member having a length defined by a distance between a first end and a second end of said support member; said support member formed of a plurality of segments (14, 16), each said segment (14, 16) in a translational engagement with an adjacent said segment (14, 16); said support member configurable to a minimum said length through a translation of said segments (14, 16) toward each other to a fully contracted configuration; said support member configurable to a maximum said length through a translation of said segments (14, 16) away from each other to a fully extended configuration; said length of said support member being infinitely variable between said minimum length and said maximum length; a continuous flexible member positioned along a member pathway running between said first end and second end of said support member; characterized in that a first portion of said flexible member extending a first length, in-between said first end and said second end of said support member; a second portion of said flexible member extending a second length, in between said second end of said support member and a movable return located in a central portion of said support member; said moveable return being at a movable position relative to said second end of said support rod during; said moveable position providing means for decreasing said second length of said second portion of said flexible member and a concurrent increasing of said first length of said first portion of said flexible member, during any increase of said length of said support rod; said moveable position providing means for increasing said second length of said second portion of said flexible member and a concurrent decreasing of said first length of said first portion of said flexible member, during any decrease of said length of said support rod; translation of said first portion of said flexible member providing means for a translation of a window treatment adapted for support by said support rod; and whereby said support rod may be configured to any said length between said minimum and said maximum length of said support rod, and fixed to a support surface without an adjustment of a fixed length of said flexible member.