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At its core, the Google search field hasn't changed between Safari 3 and 4: you can use it the same way you always have—with, perhaps, some honed techniques you'll learn here. But Safari 4 has added two new features: the drop-down list and the SnapBack button.
Start typing in the Google field in the Safari toolbar, and a drop-down menu appears, with ten suggested completions (Figure 9-1).