Possible Duplicate:
Centering a TikZ picture around an area
I'm drawing 3 circles within each other with the same centre point, each circle represents a region for the project I'm doing. I've applied labels saying what each region is, but these labels is making the diagram appear off-centre with respect to the caption. I want the diagram to take the origin (0,0) as the centre (ie make it appear as though the labels have no effect on the position of the diagram in the figure) but have no idea how to do this.
\begin{figure}[H]
\centering
\begin{tikzpicture}
\filldraw [color=red] (0,0) circle [radius=2];
\filldraw [color=Blue] (0,0) circle [radius=1.8];
\filldraw [color=Yellow] (0,0) circle [radius=1.4];
\draw [-,thin, black] (0,0) to [out=90,in=180] (3,1.5);
\node [right, black] at (3,1.5) {Label 1};
\draw [-,thin, black] (-1.6,0) to [out=90,in=0] (-3,1);
\node [left, black] at (-3,1) {Label 2};
\draw [-,thin, black] (1.9,0) to [out=90,in=180] (3,0.5);
\node [right, black] at (3,0.5) {Label 3};
\draw [color=black] (0,0) circle [radius=1.4];
\draw [color=black] (0,0) circle [radius=1.8];
\end{tikzpicture}
\caption{Caption}
\end{figure}
use as bounding boxas an argument to the red circle, I think. – Torbjørn T. Jan 19 '13 at 18:22