Here is how to find and change them. Microsoft has buried this setting inside a legacy menu. Do not look in the modern "Personalization" tab—it is not there.
Despite Windows 11’s modern focus on lock screens and dynamic lighting, the classic screen saver—originally designed to prevent CRT screen burn-in—is still available. While modern displays rarely need them, screen savers are great for privacy, nostalgia, or simply adding a touch of personality when you step away from your desk.