The tileview icon is shown in the figure below.
Click on the tileview wideget icon in the widget bar on the left side, and the tileview widget will appear in the editing area. Then create 3 screens and add them to the content of the tileview widget as the left, middle and right screens.
Note: Be sure to add screens to a tileview widget.
Reference example: http://doc.8ms.xyz/docs/case-tutorial-en/case-tutorial-en-1cmbc4954rhsv
Click on the drop-down of the widget properties area, and then add the 3 screens created as the left, middle and right screens of the tileview to the content of the tileview widget, as shown in the figure.