Use Your Mac’s Preview App to Crop, Resize, Rotate, and Edit Images Your Mac’s Preview app doesn’t just contain PDF-editing features. It’s a great little image editor, too. Preview offers basic tools for cropping, resizing, rotating, annotating, and otherwise tweaking images. Just as QuickTime will never replace iMovie in spite of all its useful media editing features, Preview will never replace Photoshop or even iPhoto. But, for some quick and basic image editing, Preview is surprisingly useful. Get an Image Into Preview Getting an image into Preview is easy. By default, you can simply double-click an image file and it will open in Preview. If you’ve changed your image file associations, you can Command-click or right-click on an image file, point to Open With, and select Preview. You can also open the Preview app from the Applications folder, Launchpad, or by pressing Command + Space to open Spotlight Search and searching for Preview. From Preview, you can open the image file directly. Or, with Preview open, you can click File > New From Clipboard to import an image file from your clipboard. You can then edit the image and get it back onto your clipboard by clicking Edit > Copy. If you’d like to take a screenshot and edit it, you can press Command+Shift+3 to snap a screenshot of your entire screen, Command+Shift+4 to snap a screenshot of a selectable area, or Command+Shift+5 to snap a screenshot of only the current window. The screenshot will be saved as a .png file on your desktop, and you can open it in Preview to begin editing it. (Or, you can hold Ctrl as you take a screenshot — Command+Ctrl+Shift+3, for example. Your Mac will save the screenshot to your clipboard, and you can import it into Preview with the File > New From Clipboard option.) GO HERE TO READ IT ALL http://www.howtogeek.com/201638/use-your-macs-preview-app-to-crop-resize-rotate-and-edit-images/
can i bring up what this doesn't tell you. the mac version of preview will be the only app that opens the file once you edit it in preview preview doesn't save the metadata to the file there for if you try to open it on windows you will have the same picture because the metadata on mac stores the modifications on won't be there in windows have fun..
