Use the Mouse device to configure your mouse as an input device. There is no additional configuration for the Mouse device since it is automatically configured by your computer system.

The Mouse device tracks the movement of the mouse; it gives an X-coordinate for horizontal movement, and a Y-coordinate for vertical movement. These coordinates can be used in the Relations pane to control models, cubes, lights, shaders, and so on.

For example, to use the mouse device to change the X and Y position of a cube, you can use a converter (Number to Vector) to change the single X- and Y-coordinates of the mouse position into a vector for the cube.

Mouse device used in a Relations constraint.