The PEG graphics library is used by the XL for all of its display controls. By default most of the windows had a Window Icon on the left side of the title bar and a Close Icon on the right side of the title bar. Some of them have a Minimize or Maximize Icon on the right side as well.

The XL application does not need the Window icon, nor does any of the application consider the use of the Close Icon.

The PEG graphics library has been modified to display none of these icons on any Window Title Bar by default. The application will now have to enable them if it intends to include their use.