[XeTeX] Pardon me for asking a PGF/TIKZ question here

[Alan Jones]

Hi:

I am trying to center a picture that I created using XFig. I converted
this fig to trikz file using fig2tikz tool. I am unable to center this
Fig in the document. I also exported the image from Xfig as a PDF
file. I am unable to center the PDF file also. The source code for the
Tikz script is as follows.

\begin{center}
\begin{tikzpicture}[y=-1cm]
% objects at depth 50:
\definecolor{fillColor}{rgb}{0,0.43137,1}
\path[rounded corners=6.3bp,draw=black,ultra thick,fill=fillColor]
(18,7.9) rectangle (0,-0.1);
\path (8.2,1.8) node[text=white,anchor=base]
{\fontsize{32.0}{38.4}\selectfont{}\bfseries The LaTeX Book Skeleton};
\path (8.5,3.5) node[text=white,anchor=base]
{\fontsize{28.0}{33.6}\selectfont{}\sffamily By};
\path (8.4,5.3) node[text=white,anchor=base]
{\fontsize{28.0}{33.6}\selectfont{}\sffamily D.J.D. Dodotoson};
\end{tikzpicture}%
\end{center}

Why isn't the tikz or the pdf image not getting centered.

Thanks for your help.

Regards,
Alan