Proximity Characteristics
Proximity Characteristics a primary element. It is mandatory to include in your digital product if applicable.
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Poor interface design (UI) can lead to proximity issues amongst various visual elements on a web page, app etc. Shape (such as a button) and location (under a form) helps the bias for people with visual or cognitive limitations. Button location can be a substitute for shape.
Summary Points:
Button location can substitute for shape with labels
Shape (button) can instantly identify purpose
Avoid elements that can overlap in a responsive design
Do not rely on shape alone or location alone
Example:
Further On This Topic:
https://www.w3.org/TR/UNDERSTANDING-WCAG20/content-structure-separation-understanding.html