Adobe 23101335 User Guide - Page 149
Selecting, About selections, Making pixel selections
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139 Chapter 5: Selecting T o modify part of an image in Adobe Photoshop or Adobe ImageReady, you first select the area you want to edit. A selected area is indicated by a dotted selection border, also called a selection marquee. The area outside the selection border is protected while you move, copy, paint, or apply special effects to the isolated area. You can choose from a variety of specialized tools for creating selection borders. About selections Since there are two different types of data in your image-bitmap and vector-you need to use separate sets of tools to make selections of each type. You can use selection borders to select pixels. When you select pixels, you are selecting resolution dependent information in the image. For more information about bitmap images and vector graphics, see "About bitmap images and vector graphics" on page 91. You can also create selections using the pen or shape tools, which produce precise outlines called paths. A path is a vector shape that contains no pixels. (See "Moving, copying, and pasting selections and layers" on page 149.) You can convert paths to selections or convert selections to paths. (See "Converting between paths and selection borders (Photoshop)" on page 180.) In Photoshop, you can use the Extract command to isolate an object from its background and erase the background to transparency. You can also make sophisticated selections using masks. (See "Saving a mask selection" on page 200.) Making pixel selections You can select pixels in an image by dragging with the marquee tools or lasso tools, or by targeting color areas with the magic wand tool. In Photoshop, you can also use the Color Range command. Making a new selection replaces the existing one. Additionally, you can create selections that add to a selection, subtract from a selection, select an area intersected by other selections, or select the union of a new selection and the current selection. Using the Select menu You can use commands in the Select menu to select all pixels, to deselect, or to reselect. To select all pixels on a layer within the canvas boundaries: 1 Select the layer in the Layers palette. 2 Choose Select > All.