To be able to design and test sites for high resolution and ultra-large displays, it would be extremely useful to also include the viewport width slider from mobile view into the desktop designer view. In combination with a scroll bar this would allow site testing for any monitor resolution regardless of the limited screen size size / resolution of the monitor you are working on.
See also https://wishlist.webflow.com/ideas/WEBFLOW-I-1654 for height adjustment of the mobile viewport preview.
Good news! Now you can resize the Designer canvas and preview how your site looks on larger devices. Read our update for more details.