Drag to the side and hold (for a couple of seconds) for a thin column docked to the side. With 2x 50% windows side-by-side, roll over the middle then see the pop up slider which enables you to resize both windows.
How do you resize a window on a Chromebook?
Drag to the side and hold (for a couple of seconds) for a thin column docked to the side. With 2x 50% windows side-by-side, roll over the middle then see the pop up slider which enables you to resize both windows.