Photoshop cs5 by steve Johnson part 2 pptx

When working with the Brush tools, available tool options include Size, Mode, Opacity, and Tolerance.. Click the Preset list arrow, and then select a preset document, or choose your own

Photoshop has an abundance of tools that

give a Photoshop designer tremendous

con-trol over any creative designing problems that

may crop up For example, the Photoshop

toolbox contains 8 selection tools (you can

never have enough selection tools), 10

paint-ing or shape tools, 4 type tools, and 12 tools

dedicated to restoring and retouching images

Add to that collection, slicing, sampling, and

viewing tools and you have a total of 70 tools

When you work on a document, it's important

to know what tools are available, and how

they can help in achieving your design goals

Photoshop likes to save space, so it

consoli-dates similar tools under one button To

access multiple tools, click and hold on any

toolbox button that contains a small black

tri-angle, located in the lower right corner of the

tool button Take a moment to explore the

Photoshop toolbox and get to know the tools

The Photoshop toolbox contains the tools needed to work through any Photoshop job, but it's not necessary to click on a tool to access it Simply using a letter of the alphabet can access all of Photoshop's tools For exam-ple, pressing the V key switches to the Move tool, and pressing the W key switches to the Magic Wand tool In addition, if a button has more than one tool available, such as the Gradient and Paint Bucket buttons, pressing the Shift key along with the tool's shortcut lets you cycle through the tool's other options You can quickly move between tools using Spring-loaded keys Rather than go back to the toolbox when you want to switch tools, just hold down the shortcut letter key for the new tool, use the tool, and then let go

of the shortcut key and you'll be back using the first tool

Working with Photoshop Tools

Toolbox

You can refer to Adobe Photoshop CS5

Keyboard Shortcuts (available for download

on the Web at www.perspection.com) for

more information on all the letter

assign-ments for the various tools To really get

effi-cient in Photoshop, you need to learn to use

both hands Use one hand for your mouse or

drawing tablet, and the other on the keyboard

to make quick changes of tools and options

Using the Options Bar

The Options bar displays the options for the

currently selected tool If you are working

with the Shape Marquee tools, your options include Feather, Style, Width, and Height

When working with the Brush tools, available tool options include Size, Mode, Opacity, and Tolerance The Airbrush mode of the Brush tool also includes Flow The Pencil tool options include Auto Erase along with the standard Brush tool options The Standard Shape tool Options bar includes Fill Pixels, Weight, Radius, Style, and Color The impor-tant thing to remember is that the Options bar is customized based on the tool you have selected For more information on these options, refer to Chapters 4, 6, and 9

Currently selected tool

Options bar

Toolbox

(New !)

Creating a New

Document

Create a New Document

Click the File menu, and then click

New.

Type a name for the document

IMPORTANT Typing a name

does not save the document You

still need to save your document

after you create it

Click the Preset list arrow, and

then select a preset document, or

choose your own options to create

a custom document

◆ Width and Height Select from

various measurements, such as

points, centimeters, or inches

◆ Resolution Select a resolution,

such as 72 pixels/inch (ppi) for

online use and 300 ppi for print

◆ Color Mode Select a color

mode, such as RGB for color

and Grayscale for black/white

◆ Background Contents Select a

background color or a

transparent background

Click OK.

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Creating a new Photoshop document requires more thought than creat-ing a new word processcreat-ing document For example, there are resolu-tion and color mode consideraresolu-tions to keep in mind You can create as many new documents as you need for your current project However, since opening more than one document takes more processing power, it's probably best to work on only one new document at a time Once a new document is created, you have access to all of Photoshop's design and manipulation tools to create anything you can imagine

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Creating a Custom Preset Document

You may find that you use the same new document size over and over again To save time, you can save the settings as a preset In the New dialog box, click the Preset list arrow, click a setting, and then change the various options to customize your new document

To name your customized preset, type a name in the Name box, and then click Save Preset

For Your Information

Selecting Color Modes and Resolution

Selecting a Color Mode

A color mode, also known as color space,

determines how Photoshop displays and

prints an image You choose a different color

mode (based on models used in publishing)

for different tasks You can choose a color

mode when you create a new document or

change a color mode for an existing

docu-ment The common color modes include:

Grayscale Best for printing black-and-white

and duotone images This mode uses one

channel and has a maximum of 256 shades of

gray

RGB (Red, Green, and Blue) Best for online

and multimedia color images Red, green, and

blue are also the primary colors on a monitor

CMYK (Cyan, Magenta, Yellow, and Black)

Best for commercial printing of color images

LAB (Luminosity, A and B channels) Best for

performing image correction This mode puts

all grayscale information on the L channel and

splits the colors to the A and B channels

For more information on color, see Chapter 8,

"Understanding Colors and Channels."

Selecting Image Resolution

Photoshop works primarily with raster

docu-ments Raster documents are images

com-posed of pixels A pixel is a unit of

information that holds the color and detail

information of the image Think of a

Photoshop document as a brick wall, with the

individual bricks in the wall representing the

individual pixels in the image Documents

opened in Photoshop have a specific

resolu-tion The resolution of the image, along with

its width and height, represents how many

pixels the image contains Since pixels (the

bricks in the wall) represent information, the

more pixels a document contains, the more information Photoshop has to manipulate or enhance the image

A typical 17-inch monitor displays pixels at

a resolution of 1,024 x 768 pixels per inch You can figure out how many pixels are present

on a 17-inch monitor by multiplying 1,024 x

768, which equals 786,432 pixels on the screen The resolution is equal to how many pixels fit into each monitor inch, otherwise known as ppi (pixels per inch) A typical moni-tor displays pixels at 72 pixels per inch

To determine the size of an image in inches, we divide the pixels by the ppi For example, an image 1,024 pixels wide at 72 ppi would be 14.2 inches wide (1,024 / 72 = 14.2)

To determine the pixels present in an image, you multiple the size by the ppi For example,

a 3 inch image at 72 ppi would have a total of

216 pixels (3 x 72 = 216) As the image resolu-tion drops, so does the output quality of the image Pixelization occurs when the resolu-tion is so low that the edges of the pixel begin to appear The higher the resolution (more pixels), the sharper your image will be

However, the higher the resolution, the larger the file size will become To optimize your image file size, you need to use the correct resolution for the specific task Use 72 ppi for web pages, CD/DVDs, and multimedia; use

150 ppi for inkjet printers, 200 ppi for photo printers, and 300 ppi for commercial printing

When working with images, it's always a good idea to start with a larger image size

You can always reduce the size of the image (subtract pixels) without losing any quality If you need to enlarge an image, you run the risk of losing image quality When you enlarge

an image, the number of pixels doesn't increase as the image does, so the pixels become larger, which results in a rougher, or more pixelated, image

When you create documents for specific purposes, such as, web, film, video, or for use on a mobile device, you know the importance of creat-ing documents that will perfectly match the output requirements of the intended file destination The preset file sizes available in the Preset menu let you create images at a size and pixel aspect ratio that com-pensate for scaling when you incorporate them into various output modes When you work with the Preset menu, the guesswork involved

in creating compatible photo, web, mobile device, film and video docu-ments in Photoshop is a thing of the past

Creating a New

Document Using

Presets

Create a New Document

Using Presets

Click the File menu, and then click

New.

Click the Preset list arrow, and

then select from the available

presets:

◆ Photo

◆ Web

◆ Mobile & Devices

◆ Film & Video

◆ Custom

Click the Size list arrow, and then

select the preset you want The

options vary depending on the

type of document you want to

create

◆ Photo For example, Landscape

4 x 6

◆ Web For example, 640 x480.

◆ Mobile & Devices For

example, 176 x 208

◆ Film & Video For example,

HDTV 1080p/29.97

If you want, adjust the available

options

Click OK.

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Using a Video Preview Option

Photoshop now includes a Video Preview option that lets you pre-view your documents on a display device such as a standard or DVD screen The device must be attached to your computer through the use of a FireWire port Once the device is attached, open a docu-ment, click the File menu, point to Export, and then click Send Video Preview to Device To set output options before viewing your docu-ment on the device, click the File menu, point to Export, and then click Video Preview The Video Preview option supports RGB, grayscale, and indexed color images, in either 8 or 16 bits per chan-nel You can adjust the aspect ratio for proper display of images

First, select the aspect ratio of the display device, either Standard (4:3) or Widescreen (16:9), and then select a placement option, such

as Center or Crop to 4:3, for the image To maintain an image's (non-square) pixel aspect ratio, select the Apply Pixel Aspect Ratio To Preview check box

For Your Information

Images displayed on a computer monitor are made up of square pixels

Conversely, an image displayed on a video monitor is not composed of pixels at all Non-square pixels are most commonly used by encoding devices for video production When importing an image created by a square-pixel graphics program into a video editing program such as Adobe Premiere, the square pixels are automatically scaled to non-square pixels for video encoding This scaling results in a distorted image By default, non-square pixel documents open with Pixel Aspect Ratio Correction enabled This enables you to preview how the image will appear on an output device such as a video monitor, and see how it will appear when exported to an analog video device In keeping with an ever-changing industry, Adobe includes the following Pixel Aspect Ratio options: DVCPRO HD 1080 (1.5) and HDV 1080/DVCPRO HD 720 (1.33)

Working with

Non-Square Pixels

Work with Non-Square Pixels

Click the File menu, and then click

New.

On the bottom of the New dialog

box, click the Pixel Aspect Ratio

list arrow, select any of the

non-square pixel settings, and then

click OK.

Click the Window menu, point to

Arrange, click New Window to

create a new window, and then

select the new window

Click the View menu, point to

Pixel Aspect Ratio, and then

select a pixel aspect ratio that’s

compatible with the video format

The original window shows the

corrected aspect ratio, and the

other one shows it without

To reset the pixel aspect ratio to

the default, click the View menu,

point to Pixel Aspect Ratio, click

Reset Pixel Aspect Ratios, and

then click OK (replaces) or Append

(replaces, yet retains any custom

values)

To remove the pixel aspect ratio,

click the View menu, point to Pixel

Aspect Ratio, click Delete Pixel

Aspect Ratio, select the aspect

ratio, and then click Delete.

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Image with a non-square pixel ratio

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