I have a simple, two-artboard document (like the old FreeHand days!) but, when I go to 'Save for Web & Devices' to optimise it, the graphic from both pages appear as one optimised image. How can I get it to select only the artboard I am viewing?
Well, one way would be to create an artboard that's the size of your art. You can do this easily enough by choosing the Artboard Tool and clicking once on your artwork. Alternatively, you can define slices.