Affordances define what actions are possible. Signifiers specify how people discover those possibilities: signifiers are signs, perceptiblesignals of what can be done. Signifiers are of far more importance to designers than are affordances.
Donald A. Norman
Affordances define what actions are possible. Signifiers specify how people discover those possibilities: signifiers are signs, perceptiblesignals of what can be done. Signifiers are of far more importance to designers than are affordances.