In the article below you will see how you can use the tab sidebar in Microsoft Edge on Windows, macOS, or even Linux.
How to show and hide the vertical tab list
Before we begin, make sure you've updated to the latest version of Microsoft Edge. The vertical tabs feature was added in version 89 of Microsoft Edge, which was released on March 4, 2021.
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Then, launch Edge and open a new window. By default, you'll see the "enable vertical tabs" button in the upper-left corner of the window. It looks like a small rounded square with a curved arrow pointing to the left. Click it.
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A column of vertical tabs will open on the left side of your browser window, and the horizontal tab bar will disappear. Once it’s open, it works as you’d expect: Click on any entry in the tab list and it’ll immediately open in the window. You can also click the “New tab” button to add a new tab, or drag and drop existing tabs to rearrange their order.
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To close the vertical tab column (and return to horizontal tabs), simply click the “disable vertical tabs” button, which looks like a square with a curved arrow pointing up. It’s located in the upper-left corner of the vertical tabs.
If you ever want to go back to vertical tabs, obviously the process is the same: Just click the “enable vertical tabs” button again. Very easy!
Information source: howtogeek.com
