AccessX is a set of features within the XKEYBOARD extension of the X Window System designed to make X more accessible to users with disabilities. XKEYBOARD is present in X11R6.1 and later. AccessX features are typically unknown, given that in many implementations no interface is provided to utilize their functionality.
Accessibility Features supported in AccessX include:
1. MouseKeys
MouseKeys is a system whereby the numeric keypad can be used to control
the mouse pointer.
2. SlowKeys
SlowKeys is a feature to "slow down" keyboard input.
3. StickyKeys
StickyKeys enables the user who is unable to press and hold multi-key
combinations to enter them in a sequential format instead.
4. BounceKeys
BounceKeys is similar to StickyKeys, except that instead of a delay
affecting all keys pressed, the delay is only enabled for the key the
user pressed last.
5. RepeatKeys
RepeatKeys sets the same parameters as the global repeat settings, but
it is important to make note of it as an accessibility feature as well.