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You'll spend a lot of time navigating around your images in Photoshop. Zooming in so you can do close detail work, zooming back out to see the whole picture, and panning around in a zoomed in image to see its different parts. Thanks to the new OpenGL technology that's built into Photoshop CS4, zooming and panning are more fun and a lot faster than they ever were before. Let's take a look at how zooming works. I'm working on a photograph that is displayed on my screen at 33.3% as you can see here in the tab for this document.
Let's say I want to get in closer. I'll go the toolbox and I'll select my Zoom tool or just press Z on the keyboard to select that tool. And then I'm going to click in my image and each time I click, I zoom in a little closer. Now it may go without saying but just to make sure you understand, at this point I'm not resizing my image in any way. I'm simply changing the magnification at which I'm viewing it. Now, if I go all the way in close, I can see a grid of pixels that are the actual building blocks that make up this image.
To zoom back out, I'm going to hold down the Option key on my Mac keyboard, that's the Alt key on PC, and click and it takes me out in increments. Now here's the new exciting part. If you have OpenGL capability on your computer, to zoom in all you have to do is select the Zoom tool and then press down on your mouse and you get continuous zooming like this, all the way down. And then to zoom out, continuously hold the Option key down. As you press your finger down on the mouse and you get this continuous zoom, very nice.
You'll also notice that even when you're zoomed to an odd percentage, like right now when I'm zoomed to 32.3%, all the details in the image look pretty good. You don't see any jagged edges and that wasn't true before the advent of OpenGL technology. To take advantage of the features that rely an OpenGL. You have to have a video card in your computer that supports OpenGL and you also have to have an OS that supports that technology, either Vista on the Windows side or Mac OS 10.4.1.1 on the Mac side.
There are a number of shortcuts to keep in mind when you're zooming. One is that instead of going over and getting the Zoom tool you can just press the keyboard shortcut Command+Plus, that's Ctrl+Plus on a PC, to zoom in from your keyboard or Command+Minus, Ctrl+Minus on a PC to zoom back out. You can also access the Zoom tool from the new Application Bar up here at the top of the screen. I'm going to zoom back in to show you what happens when you're zoomed in close and you want to see a part of an image that isn't showing at the moment.
That's when you need the Hand tool to pan around the image. You can either select the Hand tool from here in the toolbox or you can switch temporarily to the Hand tool, no matter which tool you have selected, by clicking and holding the Spacebar. Now you can see my cursor is a little hand symbol and when I click, hold, and drag, I can move the image around in its window to get to the part I want to see. There is another new feature related to the Hand tool. It's called the Bird's Eye Zoom. I'm going to press down the H key and hold it and then I'm going to click-and-hold and I see this faint box around my cursor.
If I move that box up, it indicates the area to which I will zoom when I release my mouse. And then I release the H key. This pretty much does away with the need for the old Navigator panel, because you can navigate right to the area you want to see using Bird's Eye Zoom. One more new feature is the ability to flick to scroll. To do that I'm going to hold down the Spacebar to get my Hand tool back temporarily and rather than clicking-and- dragging with the mouse, I'm just going to click and flick with the mouse.
And the image to scoots over to left even when my finger isn't down on the mouse. The last thing I want to show you is how to zoom when you have multiple images open at the same time. You can see that I have a second tabbed image here, fence.psd. To see both the plains photo and the fence photo together, I'm going to go up to the Application Bar to the Arrange Documents menu and I'm going to choose this horizontal 2 Up layout. The top image is zoomed way into more than 100% and the image on the bottom is zoomed out at only 50%.
I'm going to take my Hand tool by pressing the Spacebar and clicking in the bottom image and I'm going to push that image up so I can see its bottom-right corner. Because what I want to show you now is that you can quickly match the position and the zoom level of the top image to the bottom one, so that you can compare them. To do that I'm going to go back to the Arranged Documents menu and I'm going to choose to Match Zoom and Location. And right away, I can see the bottom- right corner of the top image, also now at the same zoom percentage of 50%.
And finally, if I want to pan around these two images together, I'm going to hold down the Shift key and the Spacebar and click-and-drag in either one of them and there they go together. So as you can see, panning and zooming has become more useful with the advent of OpenGL technology. These are skills that you're going to have to use all the time as you work in Photoshop, so please practice the few techniques I've shown you and pretty soon you'll be getting around your images like a pro.
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