Touch-operated Controls

ISSUE:

Touch-screens, flat-membrane keyboards and other contact-sensitive controls do not provide tactually discernable controls. They require the user to visually locate and identify controls. Touch-operated controls often require physical body contact. A user with an artificial limb may not be able to activate such controls.

STANDARD:

• Provide controls that can be discerned tactilely without activating them.



• Provide raised borders around controls on flat-membrane keyboards.



• Provide tactile landmarks (bumps or depressions) on "home" keys.



• provide tactile landmarks on the keys, rather than above or below them.



• Provide non-visual means of distinguishing controls and control clusters (e.g., shape, texture and/or layout).



• Provide a keyguard or overlay option.



• When a touch-screen interface is used, provide redundant physical controls.