page_title: Mouse keys
section_title: MouseKeysAccel
hierarchical_section_title: Mouse keys / MouseKeysAccel
context_page_description: Mouse keys is a feature of some graphical user interfaces that uses the keyboard
  as a pointing device. Its roots lie in the earliest days of visual editors when line and column navigation was controlled with arrow keys.
  Today, mouse keys usually refers to the numeric keypad layout standardized with the introduction of the X Window System in 1984.
context_section_description: The X Window System MouseKeysAccel control applies action (usually cursor movement) repeatedly while a direction key
  {1,2,3,4,6,7,8,9} remains depressed. When the key is depressed, an action_delta is immediately applied.  If the key remains depressed, longer than mk_delay milliseconds, some action is applied every mk_interval milliseconds until the key is released. If the key remains depressed, after more than mk_time_to_max actions have been applied, action_delta magnified mk_max_speed times, is applied every mk_interval milliseconds.
  The first mk_time_to_max actions increase smoothly according to an exponential.
  These five parameters are configurable.
caption: X window system MouseKeysAccel trajectory