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Lion's Preview application serves not only as a way to view graphics and PDF files, but also as a light editor. We'll begin our look at Preview by examining how it works with image files. And here is a picture of my pet crab, Bill. Now the toolbar holds some handy tools. So I can zoom in and I can zoom out. When I'm zoomed in, I can use the Grab tool and then move the image around so I can better see what's on screen and focus on just the parts I want to see. Zoom out again.
We'll then move onto the Selection tools. You can select a portion of your image. I've got the Rectangular Selection tool here. Now what would I do with this thing? Well, one thing I might want to do is crop that image. So I select, go to Tools, and then choose Crop. And now I've got just that selection. I'll undo that by pressing Command +Z, bear an inch back down again. I can also do an elliptical selection.
Again, Command+K this time to crop, and I can crop it that way. I can use a Lasso which is something that allows me to freehand draw my selection. Command+K, here's the crab. And there are a couple of other cool utilities down here at the bottom. One is called Smart Lasso. So what I do in this case is I just draw around the edges of the object that I want to select.
So it doesn't have to be exact. I'm going to going around the edges here, I'm going to the claw here, and I've got a couple more claws here, and there. I now have a selection. So I'll go up to the New from Clipboard command in the File menu, and now I have just the crab. So it's not incredibly great selection. I would still need to go in with a photo editing application such as Photoshop Elements for example and clean this image up a little bit.
But it is an easy way to do a rough selection of something if you like, and you can do it all within Preview which again is a free application. No, I don't want to save that. Click on there to get rid of that selection. A similar tool is Instant Alpha. So select an area that you want to create a mask for and just start dragging down while holding the mouse button or while clicking on your trackpad. And that will then create an alpha mask of what you want, and then make your selection that way.
As you see, this is even rougher than what I did before. So if you have a lot more contrast in your images, the Instant Alpha is pretty good because it can make some very good determinations where you have very hard edges on things. In this case, the top of the crab is a little bit white and it blends in a little bit with the sand around it. So it's tougher to make that kind of selection, but it is possibly in a greater contrast. You can also annotate your images if you like. Click on the Annotation button and you have multiple options here. One thing you can do is just draw shape around something.
So here's a bit here. You can use this for highlighting things if you want. If you have an image and you want to make a circle around something to draw someone's attention to something, you could use the Oval. Say look, pay attention to that. If you want to be even more obvious, use the Arrow, say this thing, the crab, this one right here! No, not the sand, the crab.
You can make things even more obvious by creating a text box. Get rid of that. And you can even have your crab think something. And indeed, he is. I could use a speech bubble but that's-- we know crabs don't speak. You can also change the color of your text if you like. That could've been red text. You can change the outline of whatever it is you're drawing.
So if we have a speech bubble, I can make the outline really dark. You can also change the font. I can change the size of the font. I can also choose a different font if I want to use that. And you have the Annotations list here. So anytime you've made a change, if I've added a text box or I've drawn a rectangle around something, all my annotations are going to appear in this list and I can see what it is that I've done to this document. There are few other things that you can do that are helpful.
Go to the Tools menu, you can adjust the size of your document if you like by pixels, or you can choose a preset size. And you can also lightly edit the look of your images by choosing Adjust Color from the Tools menu. And this is a bit like working in iPhoto. So you can make some adjustments here. You can change the Exposure. Make it a little bright or dark. I can change the Contrast if I like.
Highlights and Shadows. I can saturate the thing or I can take it down so it looks like it's a grayscale, change temperature, and so on and so forth. If you've used iPhoto for any kind of photo editing, these tools are familiar to you. And we'll Reset All to restore to its original look. One other thing. Once you've done what you need to do with your image, you can export it to another format. So go to the File menu, choose Export, and here you can change the format of your image.
So right now it's a JPEG image, but I can change this to a PDF file, PNG, or a TIFF if I chose to. And once you've done that, all you have to do is click Save and then you have another version of your document but it's in this other graphics format. We won't do that now. I'll click Cancel, and I'll close Preview. And that's a look at images in Preview.
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