The key cluster module has three keys, two buttons, and a mini trackball that doubles as a button. Use Agent to remap these keys and buttons and configure your module settings.
The mini trackball behaves like a scroll wheel, allowing for vertical and horizontal scrolling.
When the Fn layer is active, the mini trackball behaves like arrow keys, allowing quick movement in text editors.
When the Mod layer is active, the mini trackball controls the mouse pointer, but its speed is very slow due to the limited resolution of the mini trackball.