Snapping two windows side by side works as fluently on Chrome OS as it does on macOS or Windows. This means you can crack open a PDF of class materials on one side of the screen while writing your report on the other. Hit the minimize button to exit the full display mode and hold down your trackpad button. When an arrow appears, click it and the tab will automatically be resized to fit half the screen. Repeat the process on the new tab you want to see and it will snap to the opposite side.
Note: The above comes directly from their article. Click here to read more.