Microsoft is testing various layouts for the Microsoft Edge's Vertical Tab option. Currently, the browser shows a button prior to the tab row on the left. By clicking on that button the user can move the open tabs to the left and stack them vertically, or restore the traditional horizontal tab layout.
Tag: Edge Vertical Tab Button
Add or Remove Vertical Tabs Button on Toolbar in Microsoft Edge
How to Add or Remove Vertical Tabs Button on Toolbar in Microsoft Edge
Recently, Microsoft has added the vertical tabs option to the Edge browser. It is an alternative layout of the tab row, where the tabs are arranged vertically. There is also an option to collapse the tab bar, so tabs turn into website icons. For users who prefer the classic horizontal tab row, Microsoft has added the option to remove the vertical tabs button to save the space.