Windows 11 does not have a built-in feature to automatically toggle between light and dark modes, but users can achieve this functionality by installing the PowerToys app. To enable automatic switching, users must install PowerToys, open the app, navigate to System Tools, and activate the Light Switch feature. Users can choose to schedule the switch based on sunset or sunrise times or manually set a schedule. The app can also adjust color modes for the system or apps. A keyboard shortcut ("Windows key + Ctrl + Shift + D") is available for manual switching.