Desire lines are a development tool that a designer can use from the way that people actually interact with an interface, space, or object before finalizing features, paths, or navigation. It is often used in designing walking paths in a new space to help determine the best place to put a paved path. It is also used in interface design for software and industrial design for tools and other objects, but can be applied in lots of situations.
In this illustration, I made thin lines indicating paths (desire lines) that people used to get from one place to another in a space, and wider pathways reacting to the desired lines that most people chose that might be paved and formalized.
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