A picture window is a large window that does not open up
Casement windows crank open outward to the left or right allowing for ventilation.
Single-hung windows allow ventilation through the lower sash.
Horizontal Roller operate in a horizontal fashion to allow for full top to bottom ventilation.
Awning windows are hinged on the top and open outward from the bottom.
Specialty shape windows let you choose from a variety of uncommon shapes.