Photoshop cs5 by steve Johnson part 22 ppt

The History panel is linked to the History brush, which receives its information from a selected state or snapshot.. For example, the History panel holds a snapshot of the way the image

Photoshop gives you the ability to save the History states of a docu-ment as a separate text docudocu-ment, or as embedded metadata Saving History is an excellent way to retrace the steps you took to produce a particular design Not only does the saved data record the steps you took, it also records the date and time each step was performed This gives you a running record of the time spent on a document, which is useful for client billing purposes Photoshop saves the history files as a standard text document, which can be opened in any text-editing pro-gram you choose

Saving the History

State of a Document

Set Up to Save History

Click the Edit (Win) or Photoshop

(Mac) menu, point to Preferences,

and then click General.

Select the History Log check box.

Select the file type option you

want to use in saving history

information:

◆ Metadata Records the data as

embedded metadata

◆ Text File Records the data to a

text file

◆ Both Records the information

as both metadata and text

Click Choose, and then select a

location where you want to store

the files

Click the Edit Log Items list arrow,

and then select the type of data

you want to save:

◆ Sessions Only Only records

basic information, such as

when the file was opened or

closed

◆ Concise More information on

actions taken

◆ Detailed The most data,

including dates and times for

actions, and each individual

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Photoshop creates the History State file on the fly; as you work, each step is precisely recorded Photoshop does not create a separate data file for each working session; instead, it creates a single file recording all work sessions If you delete the original history data file, Photoshop will create a new file, and place it in the same location with the same name Have you ever worked on a document, performing command after command and suddenly you step back, and really like the end result? Then you immediately grab a notepad and attempt to jot down all the steps—it's always the most important step that you forget That won't happen if you use the History text file The text document faith-fully records each and every step Later, after the project is finished, you can access the file and all your commands and steps will be listed

Reviewing the History

State Text File

Open the History State

Text File

Close Photoshop

Open the folder where the History

text file is saved

The default name is Photoshop

Edit Log.txt, and the default

location is the desktop

Double-click to open the document

with your default text editor

Use NotePad (Win), TextEdit

(Mac), or a word processing

program, such as Microsoft Word

◆ The date and time the file was

opened is recorded at the top

of the document

◆ The steps performed are listed,

one at a time

◆ The date and time the file was

closed is recorded at the

bottom of the document

Close your text editor program

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Steps performed

Date and time the file was closed Date and time the file was opened

When Adobe created History, they advertised the fact that Photoshop now had more than one undo Multiple undos are a great thing; how-ever, if all you use the History panel for is to correct your mistakes, you're missing a key benefit The History panel is linked to the History brush, which receives its information from a selected state or snapshot

For example, the History panel holds a snapshot of the way the image looked when it was first opened, and by default the History brush is linked to that snapshot Think of the History brush as a photo restoration tool that always remembers the original state of the image As you work

on a document you will make changes If during the current work ses-sion, you wish to restore the document back to its original (first opened) state, the History brush is your tool The History brush is not just for cor-recting mistakes, but also for creating awesome special effects All you need is a bit of imagination and a couple of additional snapshots

Combining the History

Brush with a History

State

Correct Mistakes with the

History Brush

Select the History Brush tool on

the toolbox

Select the Brush panel.

◆ You can click the Brush Panel

button (New !) on the Control

panel or click the Window

menu, and then click Brush.

Select a size brush

◆ Select and Modify a Brush

Select a brush, and then use

the slider to specify the brush

size If you want, you can also

adjust other options, such as

Angle, Roundness, Hardness,

and Spacing (New !)

◆ Select a Brush Preset Click the

Brush Presets button or tab,

and then select a brush preset

(New !)

Drag the History brush across the

image

The areas you drag are restored to

their original (first opened) state

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Brush Preset s button and tab

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Get Fancy with the

History Brush

Apply a major change to a

document (possibility a Brush

Stroke filter)

Select the History panel.

Click the Create New Snapshot

button to take a snapshot of the

image in its current state

Click on the original snapshot to

return it back to its first-opened

state

Click in the History source box for

the snapshot you created in step 3

to change the designation of the

History brush

This instructs the History brush to

paint using the version of the

image with the filter applied

Drag your mouse over the image

to replace the original image with

the image information contained in

the selected snapshot

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Did You Know?

When you use the History brush on an

image layer, you're changing the

infor-mation based on the chosen History

state or snapshot However, you will

gain more control if you use the History

brush in a separate layer Just create

and select a new layer, and when you

use the History brush, paint in the

layer Not only does the separate layer

isolate the original image from

dam-age, but you can utilize blending modes

and opacity settings for even greater

creative control

Photoshop comes equipped with two History brushes—the History and Art History brushes The History brush paints the image back to what-ever state or snapshot is selected The Art History brush gives you the ability to create some painted effects, using information from one or more snapshots or History states In effect, the Art History brush gives you the power to combine image information (based on the active snapshot or history state) with artistic brush strokes

Using the Art

History Brush

Use the Art History Brush

Click and hold the History Brush

tool on the toolbox, and then click

the Art History Brush tool.

Select from the following options

on the Options bar:

◆ Brush Select a brush tip and

style

◆ Brush Panel Click to show/hide

the Brush panel (New !)

◆ Mode Select a blending mode

from the list The blending

modes (for a brush) control how

the colors blend with the

document colors

◆ Opacity Enter or select a value

from 1% to 100%

◆ Style Select a style for the Art

History brush

◆ Area Enter a value (0 to 500)

pixels to define the painting

area

◆ Tolerance Select a value from

0% to 100% Choosing higher

values limits paint strokes to

areas that differ from the color

used by the Art History brush;

choosing lower values lets the

Art History brush use unlimited

strokes, regardless of the color

values in the image

◆ Tablet Pressure Controls Click

to override settings and use

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Original image

Effect applied with the Art History Brush

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A Tablet Pressure Control button Brush Panel button

Photoshop has one more tool that works with the History panel—the Eraser tool By changing a preference on the Options bar, you can turn the Eraser tool into a History brush Using the Eraser tool to restore the image is just another way to get the same result as the History brush

And if you know anything about Adobe, they give you at least three ways to do everything Consider multiple ways to perform the same function as a control advantage No two Photoshop users will create the same design, and no two Photoshop users will ever tackle a prob-lem in the same way Adobe gives you choices, so choose the best way

to accomplish a task based on the available options And remember, if you change the color mode, resolution, or canvas size of the active image, the History brush tools will not work

Changing the Eraser

Tool into the History

Brush

Change the Eraser Tool into the

History Brush

Select the Eraser tool on the

toolbox

Select the Erase to History check

box on the Options bar

Select a history state or snapshot

from the History panel

Drag the Eraser tool in the image

The eraser tool does not erase the

image; instead, it paints the image

based on the current History

selection

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Did You Know?

You can use multiple layers with the

History brush When you use any of

the History brush tools, it's a smart

idea to create a new layer, and do your

History painting in the new layer That

way, if you don't like what you see, you

can always delete the layer In

addi-tion, placing the History information in

a separate layer gives you the creative

control of using layer transparency and

blending mode settings to achieve

greater creative results

The History panel is a fantastic tool! It can help you go back in time and correct errors, and even take snapshots of the image, which you can use to create new documents But all great tools come with a price

The History panel's price is consumption of RAM The more you use the History panel, the more RAM it needs If you find Photoshop slowing down on you, or if you get a warning message stating that Photoshop is running low on RAM, you might want to try a few things to help gain back some of that lost efficiency Photoshop lets you choose between 0 and 1,000 History states That's 1,000 undos, and while that might seem like a great thing to have, History states take up memory You can also check on your History settings Non-linear history requires more RAM

to maintain If you don't require a non-linear history, then you can turn

it off Since Photoshop uses a lot of RAM (64 MB just to open the pro-gram), Adobe gives you a way to purge, or clear, your memory

Controlling History

States

Purge RAM

Click the Edit (Win) or Photoshop

(Mac) menu, point to Purge, and

then select from the following

options:

◆ Undo Select this option to

remove the Undo states from

History

◆ Clipboard If you have used the

Copy and Paste commands,

that information is still

contained in RAM Use this

option to purge the Clipboard

memory

◆ Histories Select this option to

purge all the states from the

History panel

◆ All Select this option to clear

all operations from memory

used by Undo commands, the

History panel, or the Clipboard

IMPORTANT The purge option

has no undo If you select any of

the purge options, there is no

going back, so make sure you

want to purge memory

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