Change Alt key to Win key under Xfce4

To change the modifier key from Alt to the Win (Super/Meta) key for moving and resizing windows in Xfce:

1. Open Window Manager Tweaks:
   • Go to Settings → Window Manager Tweaks (or run xfwm4-tweaks-settings from a terminal).
2. Go to the “Accessibility” Tab:
   • Look for the option "Key used to grab and move windows".
3. Change the Modifier Key:
   • By default, this is set to Alt.
   • Change it to Super (or Meta, depending on your keyboard layout - this is the Windows key on most keyboards).