What method cannot be used to add a reusable component to an assembly from the Reuse Library folder?

The method of middle-clicking a component from the Reuse Library folder cannot be used to add it to an assembly because middle-clicking in Siemens NX typically serves a different purpose, such as panning the view or performing actions related to navigating the interface. Unlike dragging and dropping, double-clicking, or right-clicking, which are all standard methods for incorporating components into an assembly, middle-clicking does not initiate the process of placing a reusable component into the model.

The other methods involve interactions specifically designed to add items to the assembly. Dragging and dropping allows for direct placement, double-clicking usually opens the component for placement, and right-clicking provides contextual options, including adding the component to the assembly. These functionalities are integral to effective assembly management within Siemens NX, ensuring that users can efficiently build and modify their designs.