The visibility of a pillar can greatly affect the usability of a door. If the pillar is visible, it indicates which side of the door is attached to a hinge. This can help users understand whether to push or pull the door, enhancing the door's usability. If the pillar is not visible, it may confuse users, making the door less user-friendly.
How do designers improve their products to work around flaws in human logic? In The Design of Everyd...
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