o) The keypad arrow keys move the pointer
o) The keypad '5' key behaves like the 'default' pointer button
o) The keypad '0' key locks the default pointer button (for easy dragging)
o) The keypad '.' key unlock the default pointer button (to release a drag)
o) The keypad '+' key double-clicks the default pointer button.
o) The keypad '/' key sets the 'default' button to Button1
o) The keypad '*' key sets the default button to Button2
o) The keypad '-' key sets the default button to Button3
This is the default configuration, but the mechanism allows for nearly
infinite configurability.