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Ability to preview the design modifiying the viewport height

Hello team, I know you are immersed developing this great tool. But I would like to recommend what I consider might be a helpful improvement for designers.
I think a very good way to add responsiveness to websites is using VW and VH units. At this time the only way to view how viewport height affect the prototype is dragging the browser from the corner to decrease the height. Would you consider to add some functionality to the preview mode; in order to visualize how the VH affect the design?

Thanks in advance.