DesignOfEverydayThings - Signifier - 1

• Affordance: it is a relationship, ex. Affordance of touching exists on the entire screen
• Signifier: designer put a circle on screen to signify user where to touch
• Affordance determine what actions are possible. Signifiers communicate where the action should take place.
• Signifiers refers to any mark or sound, any perceivable indicator that communicates appropriate behavior to a person
• Ex. PUSH on a door