The visual indication of the drag.
Default is DragAndDropVisualMode.Link.
function OnGUI ()
{
var eventType = Event.current.type;
if (eventType == EventType.DragUpdated || eventType == EventType.DragPerform)
{
// Show a copy icon on the drag
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (eventType == EventType.DragPerform)
DragAndDrop.AcceptDrag();
Event.current.Use();
}
}
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