This idea has been merged into another idea. To comment or vote on this idea, please visit WEBFLOW-I-19 Canvas and Preview Mode for touch-based mobile breakpoints should be more accurate.
Currently, the height of the editor and preview is as tall as my browser window – when editing tablet and mobile breakpoints, it would be great to be able to change the height to better match the actual viewport available on the physical devices.
For example, editing in mobile landscape is very inaccurate and misleading when working with properties like background-image, percentage heights and vh units.
It would be good if it worked like the current width handle does where common sizes are shown while dragging/resizing.
More details here:
https://forum.webflow.com/t/change-height-of-canvas-in-designer-and-preview/28572
https://forum.webflow.com/t/ability-to-preview-the-design-modifiying-the-viewport-height/34622
one more wishlist-idea: automatically format links in comments ;)
https://forum.webflow.com/t/preview-height/41949
Firefox now has it. In this thread I also asked how others are dealing with this while webflow adds this feature
https://forum.webflow.com/t/preview-height/41949
Yes! I remember running into some problems when designing for mobile and using 100% vh.