Using the number keys on your keyboard, you can rapidly switch between breakpoints from within the Webflow Designer. This speeds up the web design process as you proof your designs — use 1 for Desktop view, 2 for Tablet view, 3 for Mobile landscape view, and 4 for Mobile portrait view.
If you’ve added larger breakpoints (1920 pixels, 1440 pixels, or 1280 pixels), the leftmost breakpoint becomes 1, the second-leftmost breakpoint becomes 2, and so on.