Selecting with Color
Selections based on color can be easy to make, especially when the background of an image is different from the image itself. High contrast between colors is an ideal condition for making selections based on color. You can make selections using color with the Color Range command on the Select menu, or you can use the Magic Wand Tool on the toolbox.
Using the Magic Wand Tool
When you select the Magic Wand Tool, the following options are available on the options bar, as shown in Figure 19: ■ The four selection buttons.
The Tolerance setting, which allows you to specify whether similar pixels will be selected. This setting has a value from 0 to 255, and the lower the value, the closer in color the selected pixels will be.
The Anti-alias check box, which softens the selection's appearance. The Contiguous check box, which lets you select pixels that are next to one another.
The Sample All Layers check box, which lets you select pixels from multiple layers at once.
Knowing which selection tool to use
The hardest part of making a selection might be determining which selection tool to use. How are you supposed to know if you should use a marquee tool or a lasso tool? The first question you need to ask yourself is, "What do I want to select?" Becoming proficient in making selections means that you need to assess the qualities of the object you want to select, and then decide which method to use. Ask yourself: Does the object have a definable shape? Does it have an identifiable edge? Are there common colors that can be used to create a selection?
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