Sử dụng photoshop cs5 part 18 pptx

To restore the default set-tings to a tool, right-click the thumbnail on the Tool Preset picker located at the left end of the Options bar and choose Reset Tool from the con-text menu.A

The Photoshop panels illustrated*

Using the Tools panel

The Tools panel, which is illustrated on pages

104–106, contains 60 tools and a handful of

buttons! Believe it or not, by the end of this book,

you’ll be marginally to intimately familiar with

most of them

To display the Tools panel if it’s hidden, choose

Window > Tools To choose a tool, do one of the

following:

➤ If the desired tool is visible on the Tools panel,

click its icon

➤ To cycle through related tools in the same slot,

Alt-click/Option-click the one that’s visible

➤ To choose a hidden tool, click and hold on the

visible tool, then click a tool on the menu

➤ To select a tool quickly, press its designated

letter shortcut (don’t do this if your cursor

is in type) The shortcuts are shown in the

screen captures on the next three pages The

shortcut for each tool is also listed in its tool

tip onscreen If Use Shift Key for Tool Switch is

unchecked in Edit/Photoshop > Preferences >

General, simply press the designated letter to

cycle through related tools in the same slot (for

example, press L to cycle through the three

Lasso tools) With the Use Shift Key for Tool

Switch option checked, you have to press Shift

plus the designated letter

➤ To use (spring-load) a tool temporarily while

another tool is selected, press and hold down

its assigned letter key (see the sidebar at right)

To learn the function of a tool as you’re using it,

read the brief description (tool hint) at the bottom

of the Info panel If you don’t see the tool hint,

choose Panel Options from the Info panel menu,

then check Show Tool Hints (see page 114)

Before using a tool that you’ve selected, you

need to choose settings for it from the Options

bar at the top of your screen For example, for the

Brush tool, you would choose a brush preset, and

choose diameter, hardness, blending mode, opacity

percentage, and other settings If the Options bar

is hidden, you can display it by choosing Window >

Options (see page 100)

The current Options bar settings for each tool remain in effect until you change them, reset the tool, or reset all tools To restore the default set-tings to a tool, right-click the thumbnail on the Tool Preset picker (located at the left end of the Options bar) and choose Reset Tool from the con-text menu.A Or to reset all tools, choose Reset All Tools from the menu, then click OK in the alert dialog

In Edit/Photoshop > Preferences > Cursors, you can control whether the pointer displays as cross-hairs or as the icon of the current tool or, for some tools, as a circle either the size or half the size of the current brush diameter, with or without the crosshairs inside it (see page 392)

SPRING-LOADING YOUR TOOLS

➤ To quickly access a tool and its Options bar settings temporarily without having to actually click the tool on the Tools panel, hold down its

letter shortcut key For example, say the Brush tool happens to be selected but you want to move

a layer, which requires using the Move tool You would hold down the V key, drag in the document window, then release V Or to access the Zoom tool temporarily, you would hold down the Z key

➤ This process is slightly less effi cient if you want

to access a tool that shares a slot with other tools (as most tools do) In this case, the letter shortcut accesses whichever tool happens to be visible on the Tools panel To make this work, you could plan ahead and select the tools that you want to switch back and forth among before using them

A To access these two commands, right-click the Tool Preset picker thumbnail, which is located at the left end of the Options bar.

*The 3D tools, and the 3D, Actions, Animation, Measurement Log, Notes, and Paths panels aren’t illustrated in this chapter because

they aren’t covered in this book.

AThe upper part of the Tools panel

Creates rectangular selections Creates oval and circular selections Creates 1-pixel-wide horizontal selections Creates 1-pixel-wide vertical selections

Selects areas that it detects within clearly defined shapes Selects pixels that are similar in color to the one that’s clicked

Crops the image Slices images for optimization (for Web output) Selects slices by clicking

Samples colors from an image Places color sampler (readout) points in an image Measures distances and angles or straightens the image ★

Creates Acrobat-compatible annotations

Applies brush strokes Draws freehand lines Changes colors while preserving textures Simulates traditional paint strokes; allows colors to be mixed and smudged ★

Corrects flaws without sampling Corrects flaws based on a sampled area Corrects flaws based on a selected area Corrects red-eye in portrait photos

Clones imagery within or between documents Stamps patterns

Click on or near this collapse/expand button to toggle the panel’s double-column and single-double-column formats.

Moves a layer, selection, guide, etc.; also functions as a transform tool

Creates freehand selections Creates straight-edged polygonal selections Creates freehand selections that snap to high-contrast edges in an image

Tools panel

Continued on the following page

A The midsection of the Tools panel

Lightens pixels Darkens pixels Makes pixels more or less saturated

Creates horizontally oriented editable type Creates vertically oriented editable type Creates horizontal type-shaped selections Creates vertical type-shaped selections

Selects whole vector paths Selects path segments and points

Draws curved or straight-edged shapes or paths Draws freehand shapes or paths

Adds anchor points to a path Deletes anchor points from a path Converts corner anchor points into curve points, and vice versa

Creates rectangular shape layers or paths Creates rounded-corner shape layers or paths Creates oval shape layers or paths

Creates polygonal shape layers or paths Creates straight-line shape layers or paths Creates layers or paths from custom shapes

Creates soft blends of two or more colors Fills similarly colored areas by clicking

Erases imagery by clicking or dragging Erases a sampled color to transparency Erases similarly colored pixels by clicking

Blurs edges Sharpens edges Smudges colors

Restores pixels from a History state or snapshot Paints a history state or snapshot in stylized brush strokes

Use the tool tip to learn

a tool name or shortcut.

GETTING INFO ON PHOTOSHOP FEATURES

➤ If you’re unsure what an icon signifi es, what a menu is

called, or what a panel or dialog feature or tool does, you

may get the information you need from the tool tip Let the

pointer hover on the feature in question without clicking

the mouse button, and a tip pops up onscreen (For this to

work, Show Tool Tips must be checked in Edit/Photoshop >

Preferences > Interface.)

➤ Some dialogs (such as Edit > Color Settings) have a

Description area that contains information about the option

your pointer is currently hovering over

➤ Keep an eye on the Info panel for color breakdown

readouts, document data (e.g fi le size, color profi le,

dimen-sions, resolution), and tool hints (ways to use the currently

selected tool) See page 114

➤ Use the Histogram panel to monitor changes to the

tonal ranges in an image as you apply color and tonal

adjustments See pages 203–204

Puts the document into a mode in which a selection displays as a mask and can be edited using brush strokes; when this button is clicked again, the mask is converted back to a selection

Displays and lets you change the current Foreground and Background colors

Resets the Foreground color to black and the Background color to white

Swaps the current Foreground and Background colors

Changes the document zoom level

A The lower part of

the Tools panel

Moves a magnified image in the document window Rotates the image in the document window temporarily (see page 93)

Adjustments panel

Unlike commands that are applied via the Image >

Adjustments submenu, adjustment layers don’t alter

image pixels until you merge them with their

under-lying layers They are a great mechanism for trying

out color and tonal adjustments, because you can

edit their settings and delete them at any time Plus,

adjustment layers automatically have a layer mask

By editing the mask, you can hide or reveal the

adjustment effect in specific areas of the image

Using the Adjustments panel, you can easily

create and edit the settings for adjustment layers

The panel also lets you restore the default settings to

any adjustment; hide and show the adjustment effect;

view the previous adjustment state; or, in a

multi-layered document, clip (limit) the adjustment effect

to just the underlying layer See Chapters 12 and 13

BUTTONS ON THE ADJUSTMENT PANEL

Invert Posterize Gradient

Map

Selective Color Threshold

Vibrance Hue/

Saturation Black & White

Channel Mixer

Photo Filter Color

Balance

Brightness/

Contrast Levels Curves Exposure

Clip to Layer Expanded View/Standard

View toggle for the panel

Adjustment buttons for creating adjustment layers

Clip Adjustment

Layer

Expanded View/

Standard View

toggle

Return to

Adjustment

List

Toggle Layer Visibility

The panel menu

Press

to View Previous State Reset to Adjustment Defaults

Delete Adjustment Layer

The controls for

a Black & White adjustment layer are displaying on this Adjustments panel.

of a brush stroke made with the currently selected tip and settings See Chapter 15

➤ This panel can be opened from the Window menu; by clicking the Brush Panel button

on the Brush Presets panel (see the following page); or when a tool that uses a brush is selected, by clicking the Toggle Brush Panel button on the Options bar.★

Brush panel

You’ll use the Brush panel to choose brush tips and

create custom brushes for many tools, such as the

Art History Brush, Blur, Brush, Burn, Clone Stamp,

Dodge, Eraser, History Brush, Mixer Brush, Pattern

Stamp, Pencil, Sharpen, or Smudge tool Using this

panel, you can also choose options for a graphics

tablet and stylus

Click an options set name on the left side of

the panel to display settings on the right At the

bottom of the panel, the preview shows an example

Brush stroke preview

Open Preset Manager ★

Bristle Brush Preview ★

New Brush

Show the Brush

Presets panel ★

Activate

and access

option sets

Numeral indicating the default diameter

of the tip, in pixels

Bristle Qualities options (available only when a bristle tip is selected) ★

Brush Presets panel ★

Use the Brush Presets panel to store, display, and

choose from an assortment of predefined and

user-created brush presets You can also use this panel

to change the size of any brush preset temporarily,

and to save a custom brush as a new preset

Via buttons on the panel, you can turn the

Bristle Brush preview on or off and quickly access

the Preset Manager dialog This panel can be

opened from the Window menu or by clicking

the Brush Presets button on the Brush panel See

page 260

USING THE BRUSH PRESET PICKER

Brush presets can also be chosen from the Brush

Preset picker, a pop-up panel that opens from

the Options bar (shown below) Commands for

loading, appending, and saving brushes and

brush libraries are available on the Brush Presets

panel menu and the Brush Preset picker menu

Open Preset Manager

Open or close the Brush panel

Bristle Brush Preview (on/off)

New Brush

Delete Brush

Brush Diameter

Brush presets

The Bristle Brush preview displays a schematic of the current bristle tip and the set-tings you have chosen for it.

Character panel

You can choose attributes for the type tools from

either the Character panel, which is shown below,

or the Options bar (see page 100) Open this panel

from the Window menu, or when a type tool is

selected, by clicking the Toggle Character and

Paragraph Panels button on the Options bar See

Chapter 20

Channels panel

The Channels panel displays a list of, and the

thumbnails for, all the color channels in an image

To show an individual channel in the document

window, click the channel name or press the

keystroke listed on the panel To redisplay the

composite image (all the channels), such as RGB

or CMYK, click the topmost channel on the panel,

or press Ctrl-2/Cmd-2 (See pages 2–3.)

You can also use this panel to save and load

alpha channels (which are saved selections) See

page 160 And you can use it to create and store

spot color channels, which commercial print

shops use to produce individual color plates for

predefined ink colors, such as PANTONE inks

Visibility icon for showing

or hiding the channel

Load Channel

as Selection

Save Selection

as Channel

Channel Delete New

Channel

A user-created alpha channel

A user-created spot color channel

Font family

Text color Horizontal scale

Font size

Kerning

Vertical scale

Baseline shift

Type styles

Language Anti-aliasing

method

Leading Font style

Tracking

Clone Source panel

The Clone Source panel lets you keep track of up

to five different sources (documents) when cloning

pixels with the Clone Stamp tool The sources are

represented by a row of buttons at top of the panel

You can also use this panel to hide, show, and control

the opacity and mode of the clone overlay, and flip,

scale, rotate, invert, or reposition the source pixels

before or while you clone them See pages 248–249

Five clone sources

Horizontal offset

Flip Horizontal and Flip Vertical ★

Vertical offset

Horizontal and Vertical Scale

Blending mode for the overlay

Display the clone source as an overlay

Reset transform Rotate the clone source

Hide the overlay while cloning

Display the overlay within the brush cursor

Invert the overlay

Color panel

The Color panel is one of several mechanisms that

Photoshop provides for mixing colors Choose a

color model for the sliders or color ramp from the

panel menu, then either mix a color using the sliders

or quick-select a color by clicking the color ramp

To open the Color Picker (or the Color Libraries

dialog, from which you can also choose colors),

click once on the Foreground or Background color

square on the Color panel if it’s already selected

(has a black border), or double-click the square if

it’s not selected Colors are applied by painting and

editing tools, such as the Brush and Pencil tool, and

by some commands, such as Edit > Fill and Image >

Canvas Size See page 188

Background color square Foreground color square

Warning that the current color

is outside the printable gamut

Color ramp

Histogram panel

While a file is being edited or while the

Adjustments panel is being used, the Histogram

panel provides valuable feedback in the form of a

graph of either the current light and dark (tonal)

values in the image or its current and modified

tonal values

Via the Channel menu, you can choose to have

the panel display data about the composite

chan-nel (combined chanchan-nels) or just a single chanchan-nel

You can also expand the panel to display a

separate histogram for each channel (as is shown

at right) See pages 203–204

Source channel for the graph

Source of the pixel data (all layers or just the currently selected layer)

Uncached Refresh

Displays the histogram using uncached data