Adobe PHOTOSHOP 5.0, User Manual, Page: 190 / 400

CHAPTER 8 182
Editing and Retouching
Transforming objects in two
dimensions
You can scale, rotate, skew, distort, and apply
perspective to selected parts of an image, entire
layers, paths, and selection borders. You can also
rotate and flip part or all of a layer, an entire image,
path, or selection border.
Original path and scaled path
Original selection and scaled selection border
Use the following guidelines when applying trans-
formations:
•
You can transform a linked layer. The transfor-
mation affects all the layers in the linking group.
•
You cannot apply transformations to the
background as a layer, or on 16-bit-per-channel
images. You can, however, transform selections on
the background.
•
You can apply transformations to an alpha
channel by first selecting it in the Channels palette.
(See “Using alpha channels” on page 252.)
•
You can apply transformations to a layer mask
by first selecting its thumbnail in the Layers
palette. (See “Using layer masks” on page 276.)
•
Pixels are added or deleted during transforma-
tions. To calculate the color values of these pixels,
Adobe Photoshop uses the interpolation method
selected in the General 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 51.)
To specify what to transform:
Do one of the following:
•
To transform part of a layer, select the layer,
and then select part of the image on that layer.
(See “Using the Layers palette” on page 259 and
Chapter 7, Selecting.)
•
To transform an entire layer, make the layer
active, and make sure that nothing is selected.
(See “Using the Layers palette” on page 259.)
•
To transform a path, choose a path tool or
select part or all of the path. If you select one or
more points on a path, only those path segments
connected to the points are transformed. (See
“Selecting path segments” on page 157.)