Definitions for "Top-down/bottom-up"
Uses two sets of lift cords to either stack a honeycomb shade at the top and/or the bottom.
A verstatile feature where the blind/shade stacks at both the bottom (bottom rail) and top (headrail). This system uses two sets of lifting cords.
Specialty shade with two sets of lift cords. The first set controls the bottom rail like a standard rectangular shade. The second set controls a middle rail which is attached to the top of the shade fabric. When lowered, this middle rail reveals the window from the head rail to the middle rail.