What Revit feature allows for unselectable linked elements in a project?

The feature that allows for unselectable linked elements in a project is linked to the concept of selection settings. This feature enables users to manage how linked elements are interacted with in the Revit environment. By adjusting these settings, specific linked elements can be rendered unselectable, providing a cleaner workspace for users to focus on their design elements without the distraction of linked models.

In contrast, view templates, worksets, and link settings do not directly control the selection behavior of linked elements. View templates are primarily used to apply a consistent visual style across different views, while worksets are associated with collaborative project management, allowing multiple users to work on different components of a Revit model simultaneously. Link settings refer to parameters involved in how linked models are displayed or managed but do not specifically handle the selectability of those links.