By now you know most of the theme items that can be configured for most widgets. Some widgets also have additional widget specific configuration keys that apply just to that widget. We will now go over these and describe what these options do.
Default rectangle style
Small groove style
Round style buttons
XShift=[Num]
The number of pixels to offset text horizontally when the button is pressed.
For example, XShift=2 will move the text 2 pixels to the right when the button
is pressed.
YShift=[Num]
The number of pixels to offset text vertically when the button is pressed.
For example YShift=2 will move the text 2 pixels down when the button is
pressed.
3DFRect=[True|False]
If true will draw a 3D rounded rectangle inside the pushbutton instead of the
default external rectangle when the widget has focus. Also see 3DFOffset.
3DFOffset=[NUM]
The number of pixels to offset the 3D focus rect inside the widget if used.