The user is able to predict how to use a control by its affordance.
Apart from the classic click action, e.g., on a command button, controls have other ways of interacting with them, e.g., by dragging them.
Screen real estate is often an issue when trying to give controls a different shape.
Affordance can be conveyed using different methods, e.g., by:
- Giving controls a raised, 3D appearance.
- Adding texture to the control surface indicating its affordance.
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