Open the first app or window you want to use
Press Windows key + Left Arrow or Windows key + Right Arrow to snap it to one side
Select the second app or window from the available options
Drag the second window to the opposite side of the screen
Adjust the divider between the two windows if needed
On Mac, click and hold the green full-screen button on a window
Choose Tile Window to Left of Screen or Tile Window to Right of Screen
Select the second window for the other side
Use Alt + Tab on Windows or Command + Tab on Mac to switch between apps
Close one window or exit split view to return to normal screen mode