Adobe Illustrator CS4 - Manual (Page 469)

462 USING ADOBE ILLUSTRATOR CS4
Graphs
If you don’t have the original artwork defined as a graph design, you can retrieve the original by pasting the graph
design into your artwork.
1 Choose Select > Deselect to deselect all of the artwork.
2 Choose Object > Graph > Design.
3 Select the graph design that you want to paste into your artwork, and click Paste Design.
4 Click OK. The graph design is pasted into your artwork. You can now edit it and define it as a new graph design.