Think about affordance cues when you design. By giving people cues about what they can do with a particular object, you make it more likely that they will take that action.

Affordances determine what actions are possible. Signifiers communicate where the action should take place. We need both.

‘The term affordance refers to the perceived and actual properties of the thing, primarily those fundamental properties that determine just how the thing could possibly be used. […] Affordances provide strong clues to the operations of things. Plates are for pushing.