SKIP THE ZOOM TOOL

The Zoom tool is okay to use when you need to zoom in on a particular area, but if you need to zoom out, it stinks. That's because you have to hold the Option key (PC: Alt key) and click on your image, and every time you do, it only zooms outward one step. Want to zoom in and out of your image like a pro? Instead press Command-+ (PC: Control-+) to quickly zoom in, and Command- (PC: Control-) to zoom out (that's the minus key for zooming out). Start using this, and you'll only grab the Zoom tool to zoom in, and then only half as much as you used to.