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In this movie, I'll introduce you to the four things you should know about saving an image in Photoshop. One of them is just an FYI, the other three rank among the best failsafes against losing your work found in any computer application. And this is a big panorama that I captured and stitched together, and it contains over 45 million pixels. I'm going start off here by dialing in a custom zoom value down here in the lower left corner of the screen. Now I'll press Shift+Tab in order to bring up my right side panels so I can show what I've got here.
There are three layers in all. At the bottom we have a cropped image layer and then we have two Adjustment layers. The first of which is warming up the bottom of the image and the second is darkening the sky. And I'll tell you about cropping and Adjustment layers in upcoming chapters. But for now let's say I decide to click on one of the Adjustment layers, Shift+Click on the other so that they're both selected and then press the Backspace key here on the PC, or the Delete key on a Mac, to get rid of them. Now I notice up here in the Title tab, this is the FYI part of the movie; we've got a couple of asterisks going on.
The one inside the parenthesis, that one is a little bit confusing. What that tells you is the image is using a color profile that's different than the one that Photoshop is currently set to. That actually doesn't matter because Photoshop automatically switches to the color profile employed by the image. So for now you can safely ignore that first asterisk. We'll be discussing what's going on with color profiles and color settings in a future course. That other asterisk however, the one outside the parenthesis, that one tells you that you have unsaved changes, and of course that means you could potentially lose your work.
If you want to save your changes, you'd go up to the File menu and choose the Save command, or go ahead and press that common keyboard shortcut Ctrl+S on a PC or Command+S on a Mac. And then you'll that the image saves and that asterisk outside the parenthesis goes away. The problem of course is I didn't want to save over my original image. I didn't want to lose those Adjustment layers. And this is the kind of thing that can happen every so often, you accidentally save when you don't mean to, especially if you use the keyboard shortcut, because right next toward of the S key are the A and D keys, which you use all the time in Photoshop to either select everything or deselect everything.
So it's easy to hit that wrong key. If you do, don't panic, because you can always go back in time, here's how. Go up to the Window menu and choose the History command and then you'll notice here in the History panel that I have a state that's called Delete layer, but I also have another state called Open. And if I click on that Open state, I get my layers back. I'll go ahead and now close the History panel. I have unsaved changes of course, so I'll go up the File menu and choose the Save command in order to update the image and bring back those layers.
This works when you revert an image as well. I'll bring back up my History panel and click on Delete Layer in order to go ahead and re-delete those layers, and then I'll go back to the File menu and choose the Save command in order to overwrite the image. Now I'll click on Open once again in order to go back to the Open state which contains the Adjustment layers. And if I go to the File menu, you can see that I have a Revert command which allows me to load the saved version of the image. Inside any other program, when you choose Revert you're going to get an alert message that says, really, do you want to actually want to revert the image and lose all of the changes you've made? In Photoshop, you don't get any message whatsoever.
It just goes ahead and reverts to the saved version of the image, because reversion is tracked by history. So notice here in the History panel, I not only have a History state, but I've got all the other states before, in my case just Open. So I'll Click on Open to bring back the Adjustment layers, I'll go ahead and close the History panel, then I'll go up to the File menu and choose the Save command so I keep those adjustments. So in other words, as long as you keep the image open and as long as you have access to those historical states, then you're safe.
The only time you're not safe is if you do this number. Let's say I decide to grab those Adjustment layers again and throw them away and then I go up to Close box and click on it and Photoshop asks me, hey do you want to save your changes? If I click on the Yes button or the Save button on a Mac, I'm in trouble. Then I do lose everything, because History is not saved along with the file. So what I'm going to recommend to you, don't do that. I'll go ahead and Cancel out of there and then I'll make the deliberate decision whether to save my work or not.
One more thing you should know, in Photoshop CS6 you've got another degree of protection in the form of auto-saving. I'll go ahead and press Ctrl+K or Command+K on a Mac in order to bring up the Preferences dialog box and then I'm going to switch over to File Handling on the left-hand side and notice this check box Automatically Save Recovery Information Every so often. What I recommend you do is switch it from 10 Minutes to 5 Minutes so you have more protection. And then if you find that Photoshop is dragging performance-wise, then you can always up the number later.
But I'd rather be protected than not. And I have been a program for a while now and have retrieved several files, things that would have otherwise in the old days just absolutely been lost. It's totally great, it protects you from crashing and the idea is if the program does go down, the next time you launch it, you will see a recovered file open automatically. Now I'm going to go ahead and click OK in order to accept that change. So to recap, if you see an asterisk outside the parenthesis, that means unsaved changes.
If you accidentally save a file, you may be able to still retrieve the original image from the History panel. Reverting an image is undoable in Photoshop and finally you have auto-save and auto-recover in the event you crash.
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