With our new Airkit Framework it’s easy to set up your responsive columns settings and even for your elements. In order to select different column sizes for different viewports you can simply click the button to edit the column like in the following screenshot:
After you click the edit button, you should get the options similar to the screenshot below:
As you can see from the screenshot, you can easily select the column setup for different viewports (or device sizes). Drag the selector to any column size you want, save the settings and then don’t forget to Save the Layout.