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There are often times when a single initial selection won't be sufficient, so I'd like to show you some ways that you can modify your selections to make them a little more complex. I'll start by explaining these icons up here in the Options bar. You'll find these with any of the selection tools. The first icon creates a new selection and will make your initial selection disappear, as I explained earlier. The next icon will add to a selection. The next will subtract from a selection and the next will select only intersecting parts of multiple selections.
I am going to get the rectangular Marquee tool from the toolbar and I am going to come into this image and make a selection around this blue tile. Now let's say that I want to add to this selection. To do that, I'll go up to the Options bar for the Rectangular Marquee and click the Add to Selection icon here and then I can come in and I can expand that selection by clicking inside of it and dragging off to the left and that makes that selection bigger or I could add to the selection elsewhere in the image in nonadjacent areas like this.
Now let's say that I want to remove part of the selection, to do that I'll go up to the Subtract From Selection icon and I can come into the image and click and drag over part of an existing selection to eliminate that part of the selection. I can also eliminate this part as well and then finally, there is the intersecting selection icon here, which I will select, and then I'll come into the image, I'm going to draw a vertical selection right in the middle of the existing selection around this blue tile. Now the only part that is selected is the part that intersected those two selections.
I am going to deselect by pressing Command+D and by the way there's also a Reselect command up here in the Select menu. So if I haven't made any other selections in the meantime, I can choose Reselect and that will bring back the last selection. I am going to deselect again by pressing Command+D on my keyboard. Now I'd like to show you some of these selection modification commands in the Select menu. Let's say that I want to select all of this tile. Rather than have to try to fit a selection around the whole thing, I can just make a small selection of blue pixels in the tile and then go up to the Select menu and choose Grow.
That causes the selection to expand to encompass all of the adjacent pixels to those that I'd selected that are similar in color and tone. Now let's say that I actually want to try to select all of the blue tiles in this image. This time, with a selection of some of the blue tiles active, I'll go up to the select menu and I'll choose Similar. The program attempts to select all of the blue pixels throughout the image that are similar in color and tone to those in my initial selection. So you can see that that command can save you a lot of work.
Now let's say that I've made a relatively complex selection like this and I don't want to spend the time to reselect it in the future. I can save any selection and bring it back later, even after I saved and closed the image and reopened it again. To save this selection, I go up to the Select menu at the top of the screen and I'll choose Save Selection. In the Save Selection dialog box I will give the selection a name. I call this one Blue tiles and in the operation area, I'll leave New Selection chosen and I'll click okay.
Now I'm going to deselect by pressing Command+D. So let's say sometime in the future I want to get that selection back. All I have to do is go to the Select menu, go down to Load Selection and in the Load Selection dialog box choose the correct selection from the selection menu and their can be more then one save selection in the same image and then I will click OK and that brings the selection right back. So I don't have to spend time and effort reselecting. So try using some of the techniques I have shown you here to modify your initial selections, adding to selections, subtracting from selections, growing selections, making similar selections of color and tone and when you're done, saving your selections so that you can bring them back later.
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