Select pixels
You
can edit pixels over an entire canvas or select one of the selection
tools to constrain your editing to a particular area of an image:
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The
Marquee tool selects a rectangular area of pixels in an image.
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The
Oval Marquee tool selects an elliptical area of pixels in an image.
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The
Lasso tool selects a free-form area of pixels in an image.
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The
Polygon Lasso tool selects a straight-edged free-form area of pixels
in an image.
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The
Magic Wand tool selects an area of similarly colored pixels in an
image.
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The
pixel selection tools draw selection marquees that define the area
of selected pixels. After you draw the selection marquee, manipulate
it by moving it, adding to it, or basing another selection on it.
You can edit the pixels inside the selection, apply filters to the
pixels, or erase pixels without affecting the pixels beyond the
selection. You can also create a floating selection of pixels that
you can edit, move, cut, or copy.
PDF (adobe.com)
