Perceivability

If people are not aware that the opportunity to interact exists, we should not…be surprised when they do not interact.…Hidden interactions decrease usability and efficiency. People should not need…to search for opportunities to interact. They should not guess when interacting,…due to confusion or desperation.…We should be able to review an interface, and identify where we can interact.…Interaction should not depend on luck or random discovery.…Although much of our work is visual in nature, we need to remember that some…people experience interfaces and devices differently. Do not hide important…content and functionality behind invisible interactions. Provide hints and…indicators; visual cues, such as buttons, icons, textures, and even different…textiles let people know that this may be clicked or tapped.…

Meaningful labels help people using screen readers differentiate between…content and interactivity.…The good news is that people are click or tap happy; they will attempt to…interact with anything they think may produce a result or opportunity.…