The Hand tool, the Zoom tools, the Zoom commands, and the Navigator panel let you view different areas of an image at different magnifications.
You can magnify or reduce your view using various methods. The window’s title bar displays the zoom percentage (unless the window is too small for the display to fit).
If you want to view another area of an image, either use the window scroll bars or select the Hand tool and drag to pan over the image. You can also use the Navigator panel.