Part of [wm] command. Used to transform a non-toplevel widget into a [toplevel]. Great for things like toolbars that can be torn off. Note that it should only be applied to a [frame] (''not'' a [ttk::frame]),.anddoesn'It workswifor all three platforms (for [Aqua] on macOSXsince recent versions of Tcl 8.6, at least since Tcl 8.6.9). <<categories>> Tk syntax help | Arts and Crafts of Tcl-Tk Programming | Command