howto | use Split View THE QUICK WAY
1 Locate your first app
The first step in activating Split View is to make sure both apps you want to run are open. Locate the first app you’d like to use in it, and click and hold on the green button in the top-left corner of its window. Now drag the window to the left or right side of the screen, which will be highlighted with a blue overlay. Release the mouse or trackpad to fill that area with the app.
2 Find a second app
With one app taking up half of your screen, the other windows that are open become thumbnails in the other half. Select the app (or specific window) you want to see on that side of the screen by clicking its thumbnail. The app will zoom to fill that area. You’re now in Split View mode. It is, in effect, like having both apps running in full‑screen mode simultaneously.
3 Allocate space to each
Between the two apps is a black line. Put the pointer over the line and it’ll change to an arrow icon, indicating you can click and drag to adjust the space allocated to the apps. To exit Split View, move the pointer to the top of the screen to reveal the menu bar and each app’s title bar. Click either app’s green button to remove it from Split View; the other remains in full-screen mode.