This section presents summary lists of recommendations for design issues related to access for persons with disabilities. Item numbers are based on lists in related sections of this appendix.
3. Accessibility recommendations for pointing devices
Recommended
Manipulation and Physical Design:
9 Offer separate components that allow for use of alternative input devices.
12 Eliminate hard edges or sharp corners that could cause injury or inhibit correct device placement.
13 Manufacture outer surfaces using only hypoallergenic materials.
Input and Controls:
1 Allow connection, substitution, or addition of alternative input devices.
2 Design all controls to operate from the keyboard.
4 Limit button design primarily to push-button controls.
5 Use concave buttons, especially where sustained force is required.
6 Avoid twisting motions.
7 Minimize force required for operation.
8 Make all controls operable with one hand.
9 Avoid capacitance-based controls.
10 Use functional grouping and layout of controls.
11 Make controls tactually discernible.
13 Provide tactile and audible actuation feedback for controls.
16 Space the controls a sufficient distance to allow for tactile and visual discrimination.
17 Design stable controls.
18 Manufacture input guards or provide mounting for guards.
20 Remove left-right bias.
4. Accessibility recommendations for keyboards
Recommended
Visual Displays and Indicators:
3 Make LCD and LED indicators, warning, and alert lights software-readable.
Manipulation and Physical Design:
9 Offer separate components that allow for use of alternative input devices.
10 Provide adjustable height, swivel, and so on where appropriate.
12 Eliminate hard edges or sharp corners that could cause injury or inhibit correct device placement.
13 Manufacture outer surfaces using only hypoallergenic materials.
Input and Controls:
1 Allow connection, substitution, or addition of alternative input devices.
2 Design all controls to operate from the keyboard.
3 Mount all controls on the front of the device.
4 Limit button design primarily to push-button controls.
5 Use concave buttons, especially where sustained force is required.
6 Avoid twisting motions.
7 Minimize the force required for operation.
8 Make all controls operable with one hand.
9 Avoid capacitance-based controls.
10 Use functional grouping and layout of controls.
11 Make controls tactually discernible.
12 Make the state of non-momentary controls tactually discernible.
13 Provide tactile and audible actuation feedback for controls.
14 Avoid keys that cannot be read or simulated by software.
15 Maximize size of controls within the space available.
16 Space the controls a sufficient distance to allow for tactile and visual discrimination.
18 Manufacture input guards or provide mounting for guards.
19 Provide stable keyboards.
Labeling:
1 Use large, high-contrast, bold stroke, sans serif lettering, and avoid using artwork behind text.
2 Use tactually distinct icons for controls, connectors, and legends.
3 Provide optional Braille and tactile labels.
Documentation:
All points in the Documentation section of this appendix.