My favourite tool to modify most aspects of the OS is BetterTouchTool. I have it set to move the window under the mouse cursor when I hold down Fn — and if I a

My favourite tool to modify most aspects of the OS is BetterTouchTool. I have it set to move the window under the mouse cursor when I hold down Fn — and if I also hold down shift then it resizes the window under the mouse cursor until I release Shift It must have saved me, in aggregate, hundreds of hours as I no longer have to care about finding the top or edge of a window to move/resize. Try it! An absolute game changer for productivity.