Hi @Durojaiyes
Also notice that on the right side of each layout starting from Tablet there is a little handle in the middle of the edge, you can pull it let or right depending on the breakpoint and see how it works in different breakpoints that will be shown at the bottom for different devices. You can’t set custom parameters for each of those breakpoints, only for four layouts that you select at the top, but at least you can see how it looks on each device.
Here is a little video showing that Don’t really bother for any breakpoints below 320px, only very old devices are supporting that.