Step-1: In Add layout page click on “Add a feature to home screen” option which is available at the bottom of the left menu.
Step-2: Under mobile app, select the grid and select the module which is to be added from the drop down
Step-3: Select the template color if you like to change the present color code and upload the image for that particular module and click on Add.
Step-4: Now we can see the new module added to home screen and we can add multiple modules in the same way