In Unity's UI Toolkit, every visual element has a tooltip property, but its behavior differs between editor and runtime. In the editor, tooltips display automatically. At runtime, the tooltip field is just raw string data, so developers must implement the behavior manually. One approach is to listen for pointer events, detect which element is under the cursor, and display a tooltip label near the pointer. This event-driven approach can be applied across the entire UI and customized to match the application's style.
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