Press Windows key + Left Arrow or Right Arrow to snap the active window to one side
Drag a window to the left or right edge of the screen until it snaps
Open another window and snap it to the opposite side
On Windows 11, press Windows key + Z to choose a split layout
On macOS, click and hold the green full-screen button, then choose Tile Window to Left of Screen or Tile Window to Right of Screen
Use Mission Control on Mac to arrange two apps side by side
Adjust the divider between windows to change the split size
Use a third-party window manager if your laptop does not support built-in split screen shortcuts