Archwiki said: “XFWM4 can ‘tile’ a window automatically when it is moved to an edge of the screen. It does so by resizing it to fit the top half of the screen. “

Reading:

OS: Debian 8.0 Jessie

  • Kernel: x86_64 Linux 3.16.0-4-amd64
  • Resolution: 1024x768
  • WM: Xfwm4
  • WM Theme: Numix
  • GTK Theme: Bluebird [GTK2], Bluebird [GTK3]
  • Icon Theme: hicolor
  • Font: Sans 10
  • Workspace: No miniature view
  • Title Font: Capture It
  • Tiling: Left + Right

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debian+xfwm+tiling+minimalist

Note on SS : user vs root.