Tip 228Switch Which App Edits a File You’re Working On

Let’s say you’re tweaking a photo in Preview and decide you need the full power of Adobe Photoshop.

Look at Preview’s title bar. You’ll see the name of the file currently being worked upon. To the left of this will be a small icon representing the file. This is known as the proxy icon. Click and hold it for a few seconds, and then drag and drop the icon to the Photoshop icon on your Dock or to the Photoshop icon in Applications. The most recent version of the file will open in Photoshop (to learn about versions, see Exploring OS X: Autosave and Versions).

It’s a good idea to close Preview following this. Otherwise, attempting to save the file in Photoshop will show an error message saying ...

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