Adobe Photoshop CS4 - Manual (Page 231)

224 USING PHOTOSHOP CS4
Retouching and transforming
Last updated 1/10/2010
• To the manipulate the shape, drag the control points, a segment of the bounding box or mesh, or an area within the
mesh. When adjusting a curve, use the control point handles. This is similar to adjusting the handles in the curved
segment of a vector graphic.
To undo the last handle adjustment, choose Edit > Undo.
Manipulating the shape of a warp
A. Original warp mesh B. Adjusting the handles, mesh segments, and areas within the mesh
• To change the orientation of a warp style that you chose from the Warp menu, click the Change The Warp
Orientation button
in the options bar.
• To change the reference point, click a square on the Reference point locator in the options bar.
• To specify the amount of warp using numeric values, enter the values in the Bend (set bend), X (set horizontal
distortion) and Y (set vertical distortion) text boxes in the options bar. You can’t enter numeric values if you have
chosen None or Custom from the Warp Style pop-up menu.
4 Do one of the following:
• Press Enter (Windows) or Return (Mac OS), or click the Commit button in the options bar.
• To cancel the transformation, press Esc or click the Cancel button in the options bar.
Important: When you warp a bitmap image (versus a shape or path), the image becomes slightly less sharp each time you
commit a transformation; therefore, performing multiple commands before applying the cumulative transformation is
preferable to applying each transformation separately.
Content-aware scaling
Resize images and protect content
Content-Aware Scale resizes an image without changing important visual content such as people, buildings, animals,
and so forth. While normal scaling affects all pixels uniformly when resizing an image, content-aware scaling mostly
affects pixels in areas that don’t have important visual content. Content-Aware Scale lets you upscale or downscale
images to improve a composition, fit a layout, or change the orientation. If you want to use some normal scaling when
resizing your image, there is an option for specifying a ratio of content-aware scaling to normal scaling.
If you want to preserve specific areas when scaling an image, Content-Aware Scale lets you use an alpha channel to
protect content during resizing.
Content-Aware Scaling works on layers and selections. Images can be in RGB, CMYK, Lab, and Grayscale color modes
as well as all bit depths. Content-Aware Scaling doesn’t work on adjustment layers, layer masks, individual channels,
Smart Objects, 3D layers, Video layers, multiple layers simultaneously, or layer groups.
A B