Open a terminal and fire this command:
# defaults write -g NSWindowShouldDragOnGesture -bool true
Log out. Log in.
Now you can move the windows by:
ctrl + command + drag with the mouse
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I needed this because in a two screen set up the windows would hide the bar, so they could not be dragged. In Linux this is a standard feature. Now you can do the same on MacOS.
