Figma Sites, Grid (beta), Smooth Scaling

Hi,

I’m relatively new to Figma. I’m using Figma Sites and I’m using Grid layout. I have Breakpoints set (Desktop, Tablet, Mobile). When I preview, narrowing the page width triggers the breakpoints to behave correctly, the Grid ‘snaps’ to the designated breakpoint sizes. But, how do I make it so that the Grid scales smoothly between breakpoints?

Thank’s for your help.