The Zoom tool lets you zoom in close to certain areas of an image, and zoom out to get more of a bird's eye view of what's happening.
In the top menu bar, choose View > Zoom In or View > Zoom Out.
To use the Zoom Tool
Either select the zoom options from the "View" menu (as shown above). To use the keyboard shortcut, hold ALT (PC) or Command (Mac) and press + to zoom in, and ALT (PC) or Command (Mac) and press - to zoom out.
