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The Crop Tools In Depth

           When the Crop tool is selected, the Options bar can be used to define a number of settings related to the cropped area.

          The menu on the left of the Options bar         When you finalize the crop, the resulting image will be resized
           includes a number of common aspect             to 9  9, regardless of the actual size of the crop marquee.
           ratio presets. If you choose one of            This presents a problem if you remember the principles of
           these, the crop marquee is constrained         resolution.
           to that aspect ratio. It’s important to
           note that these presets define only the        Enlarging a 3  3 area (for example) to 9  9 means the
           aspect ratio of the crop, not the size.        application needs to create enough pixels to fill in the 6 extra
                                                          inches. At 300 ppi, Photoshop needs to create (“interpolate”)
           You can also choose the W x H x Resolution option to   more than 1800 pixels per linear inch. Although Photoshop
           define custom settings for the result of a crop. For example, if   can enlarge images with reasonable success, such a
           you define the width and height of a crop area as 9  9 at   significant amount of new data will not result in the best
           300 ppi, when you click and drag to draw, the crop area will   possible quality. As a general rule, you should avoid enlarging
           be restricted to the same proportions defined in the Width   raster images by such a large percentage.
           and Height fields (in this example, 1:1).




















                       The crop area is constrained              The resulting cropped image is the
                        to the aspect ratio of the                 actual size defined in the Crop
                        defined width and height.                Image Size & Resolution dialog box.

           You can use the Set Overlay Options menu ( ) to show a   You can also click the Set Additional Crop Options button
           variety of overlays within the crop            ( ) to access a variety of crop-related choices.
           area; these follow basic design
           principles, such as the Rule of Thirds         •  If you check the Use Classic
           and the Golden Spiral.                            Mode option, the crop
                                                             marquee reverts to the same
           You can also use the commands in this             appearance and behavior as in
           menu to turn the overlay on or off. If            previous versions of Photoshop.
           you choose Auto Show Overlay, the              •  When Show Cropped Area is checked, the area outside
           selected overlay only appears when you drag the marquee   the crop marquee remains visible in the document window
           handles or click inside the marquee area to move the image   until you finalize the crop.
           inside the crop area.
                                                          •  When Auto Center Preview is checked, the crop area
                                                             will always be centered in the document window. The
                                                             image dynamically moves as you resize the crop area.
                                                          •  When Enable Crop Shield is checked, areas outside the
                                                             crop marquee are partially obscured by a semi-transparent
                                                             solid color. You can use the related options to change the
                                                             color and opacity of the shielded area.


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