You can alter the positions for these three windows by using the four icons located on the toolbar.
Tile Horizontally
Click 
to tile the window horizontally.
Tile Vertically
Click 
to tile the window vertically.
Tile Mixed
Click 
to display the tiles in a mixed arrangement.
Default Layout
Click 
to select the default layout for viewing the window(s).
Only the first window is shown in this case.
The last chosen view of windows is stored and displayed when the window is reactivated.