This UI allows you to discover how DF is interpreting input from your keyboard and mouse device.

The labels for Shift, Ctrl, and Alt light up when those modifier keys are being held down.

Similar lables for left, middle, and right mouse buttons light up when any of those buttons are being held down.

The input stream panel shows the keybindings that are being triggered. You can resize the window to see more of the stream history. The events are also logged to the external console, if you need a more permanent record of the stream.

Since right click is intercepted, it cannot be used to close this window. Instead, hit Esc twice in a row or click twice on the exit button.