Visibility of controls aids usability from "summary" of The Design of Everyday Things by Donald A. Norman
Visibility of controls aids usability is a crucial concept in design. The more visible the controls are, the easier it is for users to understand and interact with them. This principle is based on the idea that users should be able to see and easily access the controls they need to operate a system or device without having to search for them. In everyday objects, such as kitchen appliances or electronic devices, visible controls can make a significant difference in usability. For example, a microwave with clearly labeled buttons and a digital display that shows the cooking time and power level makes it easier for users to set and adjust the settings according to their needs. On the other hand, a microwave with hidden or poorly labeled controls can lead to frustration and errors in operation. Simplicity is key when it comes to designing controls that are visible and easy to use. Complex and cluttered interfaces can overwhelm users and make it difficult for them to locate and understand the controls they need. By keeping the design simple and intuitive, designers can ensure that users can quickly grasp how to operate a device without having to refer to a manual. Clarity and coherence are also important factors in ensuring the visibility of controls aids usability. Controls should be logically organized and labeled in a way that makes sense to users. For example...
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