How are jalousie windows normally opened and closed?

Jalousie windows are typically designed with a series of horizontal slats that can be adjusted to control airflow and light into a space. The most common method for operating these windows involves using a hand-crank mechanism. This allows the user to rotate the crank, which in turn causes the slats to either open or close, providing an effective way to let in ventilation while still allowing for privacy and some protection from the elements.

This functionality is particularly useful because it enables precise control over the window's position and the amount of air circulating through, which is advantageous in various climates. A hand-crank mechanism also simplifies the operation compared to other methods, making it accessible for users who may not have the strength or ability to physically lift or pull components of the window.