Responsive layout for mainui

What is the best layout to achieve a responsive display, currently im using a 2 column rows, which is fine for the PC but for phone it doesn’t want collapse the rows into 1 column,
can I set these break points for columns manually or ideally use a different layout?

That’s described here:

thanks for the link however I’m already using the Columns/rows and it doesn’t seem to be responsive out of the box,but messing around with some of the widths for each size got it working