Best practice: consider user capabilities for MFDs
User capabilities should be considered when designing
touchscreen displays. For example:
Sight problems, such as reduced visual acuity, or color-blindness, may make it difficult for some users to operate touchscreen displays effectively.
Lack of experience with touchscreen displays may cause additional problems for some users.
To assist users:
Ensure that soft-buttons and associated icons and text are sufficiently large, and have adequate contrast.
Consider further distinguishing between important soft-buttons by using different button shapes, and contrasts.
Do not rely solely on color to distinguish between important system conditions (for example, the operating status of a bilge pump). Colorblind users may find it difficult to use systems that rely on visual cues based solely on color.