The key cluster module features three keys, two buttons, and a mini trackball that serves as an additional button.
The mini trackball functions like a scroll wheel, enabling both 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.
Use Agent to configure your key cluster module in-depth.