3D menu, is mainly to parent the label to a 3D model . for this we need a 3D model Import a model and populate it in your screen. After simulating.
Parent name- Use parent name to parent your label to the model, to parent your label to the model, drag the model from you editor window or from the setup node and drop it in the empty Parent name slot.
World offset - Use world offset to edit the position of the label on the 3D model .
World Hide Distance - while in a mobile view as the camera moves closer to the 3D model the label will appear, and disappear as the camera moves further.
World hide blend Distance - will make the label fade in and out.