From CreativePro.com –CreativePro Tip of the Week: Using the Navigator panel in Photoshop:
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If you regularly work on high-res images in Photoshop and you’re not already using the Navigator panel, you’re missing out on a slick way of seeing both a close-up and a bird’s eye view of an image at the same time. That way, you can work on the small details while checking the impact of what you do on the whole image. And it can be especially useful if you have a second monitor, where you can position the Navigator panel and make it large. Open the Navigator panel by choosing Window > Navigator. As you zoom and scroll in the image, you’ll see a red rectangle in the Navigator panel representing your current view. You can click anywhere in the Navigator panel or drag the rectangle to change…”
