Which tool is commonly used to manage Sitecore security settings?

The Sitecore Security Manager is the appropriate tool for managing Sitecore security settings because it provides a dedicated interface for administering user roles, access rights, and security policies within the Sitecore environment. This tool allows developers and administrators to create, modify, and delete roles and assign permissions efficiently, which is essential for controlling who can access certain content and functionalities across the Sitecore instance.

In contrast, the Sitecore Content Editor primarily focuses on content creation and management, allowing users to edit and publish items, but it does not provide comprehensive features for managing security settings. The Experience Editor is designed for a more visual approach to content editing, showcasing how content appears on the frontend and allowing modifications in a more user-friendly manner. Similarly, the Sitecore Desktop serves as a launchpad for other tools and functionalities within Sitecore but does not directly address security management. Therefore, the Security Manager is specifically built for this purpose, making it the correct choice for managing Sitecore security settings.