Open the first window you want to use
Press Windows key + Left Arrow or Windows key + Right Arrow to snap it to one side
Select the second window from the Snap Assist options
Drag a window to the left or right edge of the screen to snap it manually
Hover over the maximize button and choose a snap layout
Use Windows key + Z to open Snap Layouts
Choose a layout with two or more sections
Drag each open window into the desired section
Adjust the divider between windows by dragging it
Use Windows key + Up Arrow or Windows key + Down Arrow to change window position if needed