What feature of AEM allows specifying the types of components visible in Edit mode?

The feature of AEM (Adobe Experience Manager) that allows users to specify the types of components visible in Edit mode is Design mode. In Design mode, authors can configure the layout and functionality of pages, determining which components can be added or edited. This capability is crucial for maintaining consistency and ensuring that content authors have access to the appropriate tools and components necessary for their work, while also aligning with the overall design and branding guidelines of the website.

Design mode facilitates the management of the authoring experience by allowing the creation of component policies, which define the availability and configuration of components based on specific criteria. This ensures that all users who interact with the content can do so effectively and in accordance with the established design framework.

Other options refer to modes that do not serve this specific purpose. Publish mode relates to the delivery of content to the live site, Preview mode allows authors to see how content will appear once published without affecting the live environment, and Review mode typically pertains to stages in the workflow process where content is evaluated by stakeholders. These modes focus on different aspects of content management and do not provide the component visibility configuration capabilities that are vital for Edit mode functionality.