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发信人: killest (矛盾), 信区: Graphics
标  题: PHOTOSHOP(86)-Using Layers
发信站: 紫丁香 (Tue Apr 28 20:36:11 1998), 转信

To delete a selected layer or floating
selection automatically, Option-click (Mac-intosh)
or Alt-click (Windows) the Trash
button at the bottom of the Layers palette.
You can also drag the layer or floating selec-tion
name in the Layers palette to the Trash
button.
Specifying layer options
The layer options let you change a layer抯 name
and opacity and control how the pixels in the layer
interact with the layers underneath. You can also
choose to make a layer part of a clipping group or
fill a new layer with neutral pixel values so that you
can apply more Photoshop effects to it.
You can choose layer options each time you create
a new layer using the New Layer dialog box, or at
any time by opening the Layer Options dialog box.
You can also change a layer抯 opacity or blending
mode using the controls in the Layers palette.
To choose options for a layer:
1 Do one of the following: Double-click the layer抯 name in the Layers
palette. (This method does not apply to most
adjustment layers.) Select the layer in the Layers palette and choose
Layer > Layer Options. Select the layer in the Layers palette and choose
Layer Options from the palette menu.
2 If desired, type a new name for the layer.
3 Choose layer options as described in the
following sections. For a discussion of the Group
with Previous Layer option, see 揅reating clipping
groups� on page 261.
4 To turn off previewing as you choose layer
options, deselect Preview.
5 Click OK.
Specifying opacity
You can use the Opacity option in the Layer
Options dialog box or the Opacity slider in the
Layers palette to change the opacity of a layer at
any time. A layer with 0% opacity is completely
transparent, while a layer with 100% opacity is
completely opaque. Each layer can be created with
its own opacity.
CHAPTER 11 258
Using Layers
If an image has only one layer with no back-ground,
or has only one layer visible, the Opacity
slider is dimmed and unavailable until you add or
display a second layer or background.
Elephant layer with 60% opacity
If you have selected a tool that does not
have a slider option in its Option palette, you
can change the opacity of the active layer in
multiples of 10% by pressing a number key
from 0 to 9 (for example, pressing 1 sets the
opacity to 10%). Pressing 0 sets the opacity to
100%. To specify an exact opacity, enter the
desired value using the keyboard.
Specifying blending modes
You use blending modes to determine how the pix-els
in a layer are blended with underlying pixels on
other layers. By applying modes to individual lay-ers,
you can create a variety of special effects. For
example, if you create a layer using Darken mode,
the pixels in the layer that are darker than the
underlying pixels are blended into the image. The
table 揕ayer blending modes� on page 265 shows
examples of the different layer modes.
The Layers palette modes include the modes that
appear in the Options palette when you paint or
edit an image. For a description of these modes,
see 揝electing a blending mode� on page 208.
Note: Unlike the options for the line tool and paint
bucket tool, you cannot select a Clear mode for
layers. In addition, the Exclusion, Color Dodge,
Color Burn, Lighten, Darken, and Difference modes
cannot be used in Lab images.
Elephant layer in Hard Light mode
259
Screen
Darken
Luminosity Luminosity 50% Color Hue
Screen 50% Dissolve
Saturation
Lighten
Hard Light
Color Dodge
Multiply
Overlay 50% Overlay
Difference
Exclusion Soft Light
Color Burn
Background
Layer 1
Original images
LAYER BLENDING MODES The layer blending modes let
you control how the pixels in the layer are blended with the pixels
in underlying layers. For a description of each
mode, see page 揝electing a blending mode� on page 212.

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Graphics 版 (精华区)