Adobe 13101332 User Guide - Page 181

Adobe Photoshop Help Using Help | Contents | Index Transforming and Retouching Back 181 5 Drag the side handles to extend the cropping bounds while preserving the perspective. Important: Do not move the center point of the cropping marquee. Photoshop needs to know the original center point of the image in order to perform perspective correction. 6 Do one of the following: • Press Enter (Windows) or Return (Mac OS); click the Commit button in the options bar; or double-click inside the cropping marquee. • To cancel the cropping operation, press Esc or click the Cancel button in the options bar. If Photoshop displays an error, it is probably due to improper placement of the corner handles or center point. Click Cancel to go back and adjust the cropping marquee; click Don't Crop to cancel the cropping operation. An error may also occur if you're working with a previously cropped image. Transforming objects in two dimensions You can scale, rotate, skew, distort, and apply perspective to entire layers, selected parts of layers, masks, paths, shapes, selection borders, and channels. Note: Pixels are added or deleted during transformations. To calculate the color values of these pixels, Photoshop and ImageReady use the interpolation method selected in the General section of the Preferences dialog box. This option directly affects the speed and quality of the transformation. Bicubic interpolation, the default, is slowest but yields the best results. (See "Choosing an interpolation method" on page 66.) Specifying what to transform You can apply transformations to a selection, an entire layer, multiple layers, or a layer mask. In Photoshop, you can also apply transformations to a path, a vector shape, a vector mask, a selection border, or an alpha channel. Note: You cannot apply transformations to16 bit-per-channel images. You can, however, apply full canvas transformations to 16-bit images using the options in the Image menu. (See "Rotating and flipping entire images" on page 177.) To specify what to transform: Do one of the following: • To transform an entire layer, make the layer active, and make sure nothing is selected. Important: You cannot transform the background layer. However, you can convert a background layer to a regular layer. (See "Adding layers and layer sets" on page 286.) • To transform part of a layer, select the layer, and then select part of the image on that layer. • To transform multiple layers, link the layers together in the Layers palette. (See "Linking layers" on page 289.) • To transform a layer mask or a vector mask, unlink the mask, and select the mask thumbnail in the Layers palette. (See "Masking layers" on page 314.) • (Photoshop) To transform a path or vector shape, use the path selection tool to select the entire path or the direct selection tool to select part of the path. If you select one Using Help | Contents | Index Back 181