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In this movie, I'll show you a few ways to incrementally zoom in and out from an image. I'm seeing this image at a 25% view size. And I know that because I see 25% up here on the title and I also see it listed down here in this field in the bottom left corner of the Image Window. Now that's great for taking in the image wide, that means I'm not seeing much detail, because after all, what Photoshop is doing is showing me, one quarter of the pixels both horizontally and vertically. So it's really only showing me one out of every 16 pixels, and it's doing so by averaging the colors inside the image.
If I want to zoom in so that I can take in more detail, I could go up to the View menu and choose the Zoom In command, but you end up zooming in and out so much in the software, you're better off using the keyboard shortcuts, and they're very easy to memorize, it's Ctrl++ or Command++ on the Mac to Zoom In and Ctrl+- or Command+- on the Mac to Zoom Out. So let me show you what that looks like. I'll go and press Ctrl++, that would be Command++ on the Mac to zoom from 25% to 33%, so we're getting more detail out of the image.
That would be one out of every three pixels horizontally and vertically, so one out of every nine pixels overall. Go and Press Ctrl++ or Command++ on the Mac to zoom in the 50% and then it's 67% and then it's 100%. At 100%, you're seeing one image pixel for every screen pixel, so if you zoom in any further than that, for example, I just zoomed to 200% by pressing Ctrl++ or Command++ again, then you're increasing the size of the pixels. So at this point, each image pixel is taking up four pixels on a screen.
To zoom out you press Ctrl+- or Command+- on the Mac, and again, we're observing the same increments that we saw before, so these are both incremental zoom techniques. The great thing about these shortcuts is they're easy to remember. But the bad news is that Ctrl++ for example, just goes ahead and zooms in on that central portion of the image. It's unlikely however, that I want to zoom in on the top of her lip. In fact, I want to zoom in on her eyes, so I'm going to go ahead and back out once again. And if you want to control the detail that you're zooming into, then you use this tool down here at the bottom of the toolbox, the Zoom tool, and notice that that little tooltip, lists the keyboard shortcut in parentheses of Z. If you press and hold the Z key you can get the Zoom tool on the fly, so this is another great shortcut if you care to memorize it.
With the Z key down, I'm going to click on her eye a few times in order to zoom in on it. So you can see, even though I'm following the exact same zoom increments, this time I'm controlling the point of zoom inside the image. If I want to zoom out, with that Z key still down, I'd also press the Alt key or the Option key on the Mac, and click inside the eye to back off from it. Then after you zoom out and you're done clicking, go ahead and release the Z and Alt keys or the Z and Option keys to return to the previous selected tool, which in my case is the default Rectangular Marquee tool.
Now for any reasons you end up having problems with this Z key technique, I'll show you one other, just so you know about it. You can also get to the Zoom tool by pressing the Ctrl key along with the spacebar. That would be the Command key with the spacebar on the Mac, and keep those keys down and zoom on in. If you want to zoom out, you add the Alt key here on a PC or the Option key on the Mac. So that would be Ctrl+Alt+Spacebar on the PC and Command+Option+Spacebar on the Mac. So not nearly as memorable of course, but a little bit more reliable because the Zoom tool never ends up remaining selected after the operation is over.
Couple of other commands to know about; if you want to zoom all the way out, as well as center the image on screen, then go up to the View menu and choose Fit on Screen, or you can press Ctrl+0 or Command+0 on the Mac. If you want to zoom in to 100%, so that you can see one image pixel for every screen pixel, then you can choose the actual Pixels Command which has a keyboard shortcut of Ctrl+1 for 100, or Command+1 on the Mac, and now I'll go ahead and zoom in, in this case on the center portion of the image, because we just got through centering it a moment ago, but I can easily scroll to another location inside the image if I like.
And that's how you incrementally zoom in and out from the image using a combination of commands, the Zoom tool and some helpful keyboard tricks, here inside Photoshop.
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