Typically, they glide along a track. Retractable screens for doors are usually manually operated and for large openings like those found on porches and covered patios they are sometimes motorized.

The new retractable screen is designed to match perfectly with Andersen® 200 Series, 400 Series, and A-Series gliding patio doors. With premium metal hardware and high-end retention performance ...

Most retractable awnings are available in a range of sizes, solids, and prints. The smallest can be installed above doors and ... area on the deck or patio, or a privacy screen for a hot tub.