I did a video recently showing 3 ways to center a window. I missed one! Turns out that there is a hidden menu item Window, Arrange in Front. You have to hold down Option to see it. That can be used to center a single window or group windows in a neat way and center the group. <strong>Note:</strong> Only seems to work in apps where a window = a document. So in Reminders and Notes it doesn't work (actually does on a floating-window Note, just not the main window). Have to investigate more as to which apps do it and which don't.
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