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[Centre Window on Screen] Centres the frontmost window on screen #AppleScript #SystemEvents #UI #window #position
use application "System Events"
property process : a reference to (first process whose frontmost = true)
property window : a reference to front window of my process
property display : a reference to scroll area 1 of process "Finder"
if not (my window exists) then return
set [width, height] to size of my window
set [screenX, screenY] to size of my display
set position of my window to [(screenX - width) / 2, (screenY - height) / 2]
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