options: -relief

Command-Line Name: -relief
Database Name: relief
Database Class: Relief
Specifies the 3-D effect desired for the widget. Acceptable values are:
tk-relief: raised tk-relief: sunken tk-relief: flat tk-relief: ridge tk-relief: solid tk-relief: groove
The value indicates how the interior of the widget should appear relative to its exterior; for example, raised means the interior of the widget should appear to protrude from the screen, relative to the exterior of the widget.