What command is used to manually animate an under-constrained assembly component?

The command used to manually animate an under-constrained assembly component is the drag component command. When an assembly is under-constrained, it means that certain components do not have enough constraints applied to restrict their movement fully. By utilizing the drag component command, users can simulate the movement of these components within the assembly environment. This command allows you to click and drag the component to see how it behaves in relation to other components, effectively enabling an exploration of the assembly's functionality.

In contrast, other commands, such as move component, typically require more specific parameters or controls for placement rather than simple animation. The animate component command is generally used for predefined animations rather than manual, real-time interaction. Similarly, the rotate component command is limited to rotational movements, rather than providing the flexibility that dragging offers.