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In this exercise I'm going to show you how to scroll and zoom an image using the scroll wheel on your mouse. It starts off pretty darn predictably. If you move your scroll wheel up, you're going to scroll upward inside the image. If you move it down, you're going to scroll downward. I mean what will they think of next? But here's the question, how do you move side-to-side, after all your typical everyday average mouse is made for business types, right? Folks who are in their word processors and their spreadsheets and their Internet browsers looking at their terribly tall documents, but never needing to go left or right.
What do we creative professionals do inside the vast 2D world of Photoshop? Well, you do the same thing you do with the Page Up and Page Down keys. You press the Ctrl key here on the PC and the Command key on the Mac and with that key down, if you scroll upward, you'll scroll to the left. And if you scroll downward you'll move to the right. So that's what happens when you press the Ctrl key, once again the Command key on the Mac. Now, some of you Macintosh users might cry foul and say, we don't need the Command key for this. We have our MacBook track pads and we have our Magic Mice, and we can sit there and do the two-finger swipe and go any direction we want to, and that is absolutely true.
So, you can swipe side-to-side, up-and-down, diagonally anyway you want. And Photoshop is super responsive. You don't have to change tools or anything. All right! A couple of other tricks, I was telling you when you're using the Page Up and Page Down keys, if you press the Shift key you'll move in smaller increments, well it's exactly the opposite way with your scroll wheel. If you press the Shift key and scroll up, you'll move an entire screen upward as you can see here in the Navigator. And if you press the Shift key and scroll down, you'll move an entire screen downward. And that's just one increment of my scroll wheel there.
If I press Control+Shift or Command+Shift on the Mac and I scroll up, I'll move the screen leftward, scroll down and I'll move the screen rightward. So, you may take advantage of that, you may not. This next one I think is really great. I think this is actually really, really great. I'm going to press Control+1 or Command+ 1 on the Mac in order to zoom into 100%, scroll down just a little bit using my scrollwheel of course. If you press the Alt key or the Option key on the Mac and scroll up, then you'll zoom in, like so.
If you press the Alt key or Option key and scroll down, you will zoom out. This also works on the Mac with the two-finger swipe. So, if you press the Option key and swipe up, you're going to zoom in, Option+Swipe down is going to zoom you out. Now, what I love about this, bear in mind I'm at 100% here. So, if I were to press Control++ or Command++ on the Mac I zoom into 200%, because you have no control over these colossal increments when you're zooming either using the Commands or using the Zoom tool.
Compare that to the scroll wheel, I'll go ahead and zoom back out to 100% here. If I press the Alt key or the Option key on the Mac and scroll up one increment, I go to 110%. How awesome is that? Just 10% in. And if I press the Alt key or the Option key on the Mac and scroll up another increment, I'll go to 121. Well, how in the world does that figure? It's 10% more, because 10% of the 110 is 11. You add that to 110 and you get 121. So, you're always zooming in or out 10% with respect to your current zoom ratio, and that gives you all of the control in the world.
So, definitely when you're thinking about zooming especially by fine increments, do something that almost no Photoshop user does, and go ahead and press the Alt or Option key while using the scroll wheel on your mouse.
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