windowscentral[.]com/software-apps/microsoft-edge-gains-hidden-split-screen-feature-for-running-two-webpages-under-one-tab
Type "edge://flags" into the address bar and hit enter
Search for "split-screen"
Click the drop down and select "Enabled"
Restart Microsoft EdgeFrom there, you'll see a new split button in the address bar on the right, and clicking it will split the view and allow you to open a second webpage in the current tab. You can also initiate this view by right-clicking a link and selecting "open in split-view."