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Get the ultimate foundation in Adobe Photoshop CC, in this update to the flagship series Photoshop One-on-One. Deke takes you on a personalized tour of the basic tools and techniques that lie behind great images and graphic design, while keeping you up to speed with the newest features offered with Creative Cloud. Learn to open images from multiple sources, get around the panels and menus, and work with layers—the feature that allows you to perform masking, combine effects, and perform other edits nondestructively. Then Deke shows how to perform important editing tasks, such as cropping and straightening images, adjusting the luminance of your image, correcting color imbalances and enhancing color creatively, and finally, retouching and healing.
In this movie, I'll show you how to find the intersection of two selections, which allows you to effectively use one selection outline to crop another. This may be the most challenging movie in this course, just in terms of the number of keys you have to press and so forth. So we're going to start things off with a little bit of a rehearsal so you understand what's going on. We're just going to find the intersection of a square selection outline and a circular selection outline. So I'm going to start by dragging from the intersection of the two guides like so, and notice that I'm drawing my marquee from corner to corner.
If while I'm dragging I press and hold the Alt key or the Option key on a Mac, then I immediately start drawing from the center outward. And if I press the Shift key I'll also constrain my shape to a square. If I want that to remain the case I have to keep those keys down. If I release the keys, then I go back to the corner to corner behavior and I'm drawing a rectangle instead of a square. So, I'll press both Shift and Alt, or Shift and Option on a Mac, then release my mouse button, and then release the keys in order to draw a square from the center outward.
Now let's say I just want to keep those portions of that square selection that fall inside the moon. So I'll go ahead and grab my Elliptical Marquee tool. And I was telling you, if you press the Shift key, then you get a little plus sign next to your cursor, which shows you that if you drag, you'll add to the selection. That's of course not what we want. So I'll press Ctrl+Z, or Cmd+Z on the Mac. If you press the Alt key, or Option key on the Mac, you'll get a little minus sign, which means that if you drag, you'll subtract from the selection, which is also not we want.
So, I'll go ahead and press Ctrl+Z or Cmd+Z again. If you press both Shift and Alt or Shift and Option on the Mac, then you get a little x, which means you're going to find the inner section of two selection outlines. That's what we want. So, I will begin dragging from the center once again, while pressing the Shift and Alt keys or the Shift and Option keys on the Mac. However, notice that my ellipse begins at the guidelines. I want it to be centered on the guides, so this is the tricky part. You keep the mouse button down and you release the keys.
Then you immediately repress the Alt key, or the Option key on a Mac, and all of sudden you're drawing the selection outline from the center out. If you want to draw a circle, then you repress that Shift key. So in order to do what I'm doing here I had to release the Shift and Alt keys or the Shift and Option keys on a mac, keep the mouse button down, and repress those exact same keys. Shift and Alt on the PC. Shift and Option on the Mac. Keep those keys down, release the mouse button, and then release the keys, and that's how you create a selection outline in the shape of a square inside of a circle.
And just to confirm that's the case, because it's a little more obvious this way, I'll press the Q key in order to switch to the Quick mask mode. So, the reason we rehearse that is because things get a little trickier when we have a bunch of marching ants all over the screen. And just to give you a sense of where we are going here, I'll switch to the final version of the composition. Notice this hidden rays layer inside the Layers panel. If you Alt+click or Opt+click on the square in front of that layer, you'll see what we're trying to create. So, I want to create a series of rays that are cropped inside of an ellipse, which means the first thing we need to do is take our ray selection outlines, and crop them inside of an elliptical selection outline.
So let's try it out here. I'm going to switch back to the image at hand, which is still daytimemoon.psd. I'm going to zoom in, so I could better see what I'm doing. What I want to do is start at that guide intersection, but I can barely see it through all these marching ants. So, I'm going to hide everything for a moment, by pressing Ctrl+H or Cmd+H on a Mac. So that hides all the screen folderol, all my selection outlines, my guides and so forth. The image is still selected, so don't worry about that. If I press Ctrl+H or Cmd+H again, everything comes back.
Anyway, I'll press Ctrl+H or Cmd+H on a Mac. Now I need to bring back my guidelines, by going to the View menu, choosing the Show command, and then choosing Guides. And that'll bring those guides back up, so now I at least have a starting point for my elliptical marquee. Now the elliptical marquee tool's still selected. I'll press the Shift and Alt keys or the Shift and Option keys on the Mac. Notice I get a little x next to my cursor and I'll begin dragging. But notice rather than getting an ellipse that's centered on the guides, I have one that's resting against and on the guides.
I'll keep my mouse button down, I'll release the Shift and Alt keys, or the Shift and Option keys on the Mac, and then I'll repress the Alt key or the Option key on the Mac. We don't need Shift anymore, because we're not drawing a circle. But I do need to keep that Alt or Option key down. And notice that I'm moving the ellipse outwards so it's about three-quarters of the way into the tree, and up into the sky quite a bit as well and nearly touching the moon. So it's just down and to the left of the moon a little bit. And then I'll release the mouse button, and then I'll release the Alt or Option key.
And I end up getting exactly the effect I'm looking for, which is a series of ray shaped selection outlines cropped inside of an ellipse. Now let's take what we've made and turn it into a layer. Go ahead and click on the background to make sure it's active here in the Layers panel. And then we'll create a new layer by going up to the Fly Out menu icon and choosing the New Layer command. And I'm going to call this new layers Rays, and then click OK. And now we need to fill the selection with white. And we can do that by going up to the Edit menu and choosing the Fill command.
And then inside the Fill dialogue box, change use from Content Aware to the very last option, White. And make sure the blending options are set to the default. That is mode, normal, opacity 100%, preserve transparency off, and click OK. And we end up getting our base rays. Now, you can press Ctrl+D or Cmd+D on the Mac in order to deselect the image. And that, friends, is how you effectively crop one selection outline inside of another by finding the intersection of two selections.
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