lift(), tkraise(),
lift(above), tkraise(above)
Moves the widget to the top of the window stack.
If the widget is a child window, it is moved to the top of its toplevel window. If it is a toplevel window (like the root or a Toplevel window), it is brought in front of all other windows on the display.
If an argument is provided, the widget is placed just above the specified widget.
lower(), lower(below)
Works like lift, but moves the widget to the bottom of the stack,
or just below the specified widget.