User's Manual

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ADOBE PHOTOSHOP CS2
User Guide
To calculate the color values of pixels that are added or deleted during transformations, Photoshop and ImageReady
use the interpolation method selected in the General area of the Preferences dialog box. This setting directly affects
the speed and quality of the transformation. Bicubic interpolation, the default, is slowest but yields the best results.
See also
“Choosing an interpolation method” on page 183
To select an item to transform
❖ Do one of the following:
• To transform an entire layer, make the layer active, and make sure nothing is selected.
Important: Y
ou cannot transform the background layer. To transform it, first convert it to a regular layer.
• To transform part of a layer, select the layer in the Layers palette, and then select part of the image on that layer.
• To transform multiple layers, link the layers together in the Layers palette.
• To transform a layer mask or a vector mask, unlink the mask and select the mask thumbnail in the Layers palette.
• (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 or more points on a path, only those path
segments connected to the points are transformed.
• (Photoshop) To transform a selection border, make or load a selection. Then choose Select > Transform Selection.
• (Photoshop) To transform an alpha channel, select the channel in the Channels palette.
See also
“To link and unlink layers” on page 401
“To select a path” on page 461
Applying transformations
The commands under the Transform submenu let you apply the following transformations to an item:
• Scalingenlargesorreduces an item relative to its reference point, the fixed point around which transformations are
performed. You can scale horizontally, vertically, or both horizontally and vertically.
• Rotating turns an item around a reference point. By default, this point is at the center of the object; however, you
can move it to another location.
• Skewing lets you slant an item vertically and horizontally.
• Distorting lets you stretch an item in all directions.
• Applying perspective lets you apply one-point perspective to an item.
• (Photoshop) Warping lets you manipulate the shape of an item.
In Photoshop, you can perform several commands in succession before applying the cumulative transformation. For
ex
ample, you can choose Scale and drag a handle to scale, and then choose Distort and drag a handle to distort. Then
press Enter or Return to apply both transformations. In ImageReady, you can perform multiple types of transforma-
tions at the same time using the Transform > Numeric command.