What tool allows developers to see the effects of localization UI updates during a work session in Designer Studio?

The tool that enables developers to see the effects of localization UI updates during a work session is the Locale preview tool. This tool allows developers to preview how the user interface (UI) will appear in different locales or languages without needing to deploy changes or log out of their session. It is particularly useful when making real-time adjustments to the localization settings, ensuring that developers can visualize adjustments to text, date formats, and other locale-specific elements.

Using the Locale preview tool, developers can simulate various user experiences based on localized settings, allowing them to ensure that their applications provide a consistent and accurate experience for users across different regions. This capability significantly enhances the quality of the localization process by catching potential issues before they are rolled out to users.