Set the size and position of the main window. Arguments: width: as integer a size in pixels, as float a fraction of the screen. Default is 50% of screen. height: as integer the height in pixels, as float a fraction of the screen. Default is 75% of screen
(self, width=_CFG["width"], height=_CFG["height"],
startx=_CFG["leftright"], starty=_CFG["topbottom"])
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