Signifiers

A signifier is any perceivable signal that communicates where and how an action should take place: a label, an icon, a visible cue. Where affordances determine what is possible, signifiers communicate it.

Why it Matters

People act on what they perceive, not on what is possible. A door with a graspable handle on the push side invites the wrong action. Good signifiers make the right action discoverable without instruction.

Signals

• People use the wrong control or hesitate about where to act.
• Someone tapes a "push" or "pull" sign onto an object to fix it after the fact.

Benefits

Correct actions become obvious, which reduces errors and the need for documentation.

Risks

Missing signifiers (the affordance is present but invisible); misleading signifiers that point to the wrong action.

Tensions

More signifiers add visual clutter, and minimalist aesthetics can strip away the cues users actually need. Beauty competes with clarity.

Examples

A flat "push" plate versus a graspable handle; an underline signifying a clickable link; a progress bar signifying that work is underway.