This component is used to display the UI, which is always displayed on the screen, in a position suitable for each device.The Game Object to which this component is added will have its Rect Transform set so that it is positioned in consideration of the system UI for each device.
By positioning UI elements relative to the Rect Transform of the Game Object to which this component has been added, you can display them in a position that is appropriate for each device. For more information on positioning Unity UI, see [Basic Layout](https://docs.unity3d.com /en/2019.4/Manual/UIBasicLayout.html).
You can also set the tracking position of the child object automatically by pressing the Anchor auto-set button.
This component needs to be a child of the Player Local UI in order to work properly.