A person’s behavior on the Web is highly goal-driven. People have something they want to accomplish, whether it’s making a purchase, finding a recipe, or learning how to do something new. Inherent in many web page designs, therefore, is information to help a user perform an action. For example, if you design a button that must be clicked to reach a desired goal (e.g., placing an item in a shopping cart), then shadowing the button so it appears to be raised will help your audience understand that the shape is a clickable object.
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