Slat data tab on Window Blinds Dialog.
Enter details on the slats
The slat angle is the angle between the glazing outward normal to the slat outward normal. A slat angle of 0° sets slats to be vertical and an angle of 90° sets them to be horizontal.
The openings data allows you to define the distance between the blind and the window and also define the fraction of the shade surface that is open to air flow on each side of the blind
A slatted blind can be applied inside, outside or mid-pane. Note that if the Blind is applied mid-pane, the gap between the inner pane and the second pane must be at least large enough to accommodate the slat width.