The StickyKeys feature of Windows is useful to users who have difficulty pressing more than one key at a time. When a StickyKeys user presses and immediately releases a modifier key, the system latches the modifier and plays two short tones. The system unlatches the modifier when the user types a non-modifier key such as a letter or clicks the mouse. Alternatively, if the user presses and releases the same modifier key again, the system locks the modifier and plays one short, higher-pitched tone. The system then unlocks the modifier and plays one short, lower-pitched tone when the user presses and releases the same key a third time.
Windows's implementation of StickyKeys only makes the Shift, Control, Alt, and Windows keys sticky. However, System Access also uses Caps Lock, Insert, Scroll Lock, and NumPad 0 as modifiers. Therefore, when StickyKeys is enabled, System Access makes these keys sticky. When a StickyKeys user presses and immediately releases a System Access modifier key, System Access latches the System Access modifier and plays two short tones. System Access unlatches the System Access modifier when the user types a non-modifier key such as a letter. Alternatively, if the user presses and releases the same System Access modifier key again, System Access unlatches the System Access modifier and plays one short tone. If a StickyKeys user presses and releases a System Access modifier key twice within two seconds, System Access passes the second keypress on to Windows, thus allowing the user to use Caps Lock, Insert, Scroll Lock, and NumPad 0 as originally intended. Because one never needs to keep the System Access modifier active across keystrokes, System Access does not implement StickyKeys' locked state for the System Access modifier.
There is no conflict between StickyKeys and System Access's Remote Training and Support feature. Thus, StickyKeys users can both receive and provide remote training and support. This feature increases employment opportunities for trainers and technicians who have both visual and mobility impairments.