Open the Catalog Bar mobile app on your mobile.

The catalog shown in the above image is in the list mode.
To change it into grid mode, click on the menu icon  on the right top of the catalog.

Click on the “Grid Mode” button on the drop-down options

Now, you see the images of the catalog in grid mode.

In the same way, you can switch it to list mode

Click on the menu icon on the top right of the catalog

Click on the “List Mode” button on the drop-down options

Now, the catalog has switched to list mode again