Photoshop cs5 by steve Johnson part 4 pptx

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22 Chapter 1
You can modify the size and resolution of a document after opening.
However, be aware that changing the size and/or the resolution of an
image forces Photoshop to add or subtract pixels from the image in a
process called interpolation. For example, when you change the reso-
lution of an image from 72 ppi (pixels per inch) to 144 ppi, Photoshop
must add more pixels. Conversely, if you reduce the resolution,
Photoshop must remove pixels. The image interpolation method deter-
mines how Photoshop completes this process. You can use the Nearest
Neighbor method for the fastest way, but it produces the poorest visual
image. Or, you can use the Bicubic Sharper method, which takes the
longest to perform, but produces the best visual results.
Changing Image Size
and Resolution
Change Image Size
Open an image.
Click the Image menu, and then
click Image Size.
Select the Resample Image check
box.
Click the Resample Image list
arrow, and then select an option:
◆ Nearest Neighbor. Best for
quick results with low quality.
◆ Bilinear. Best for line art.
◆ Bicubic. Default, best for most
purposes with high quality.
◆ Bicubic Smoother. Best for
enlarging an image.
◆ Bicubic Sharper. Best for

reducing an image.
To ma int ain i mage propo rti ons ,
select the Constrain Proportions
check box.
Enter the desired sizes in the
image size boxes.
If you choose to constrain
proportions in step 5, when you
change a size, the other boxes will
adjust automatically.
Click OK.
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Icon indicates constrained proportions
Using a Large Canvas Size
Photoshop supports documents up to 300,000 pixels in either dimen-
sion, with up to 56 channels per file. Photoshop offers three file for-
mats for saving documents greater than 2 GB: PSB, Photoshop
RAW, and TIFF. It's important to note that most programs, including
older versions of Photoshop (before the CS version), support a maxi-

mum file size of 2 GB.
For Your Information
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Chapter 1 Getting Started with Photoshop CS5 23
Change Image Resolution
Open an image.
Click the Image menu, and then
click Image Size.
Clear the Resample Image check
box.
Enter a resolution, which
automatically adjusts the Width
and Height fields.
Click OK.
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From the Library of Wow! eBook
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24 Chapter 1
As time passes, Photoshop—like any other program—will change.
There are two types of changes to a program: updates and patches.
Updates are improvements to a program such as a new feature, option,
or command. Patches are software fixes for problems discovered after

the public release of the program. The good news is that both updates
and patches are free, and once downloaded, are self-installing. Adobe
gives you two ways to check for changes. You can check manually by
going to the Adobe web site, or automatically through the Adobe
Updater. The Adobe Updater Preferences dialog box allows you to set
update options for Photoshop and other installed Adobe products, such
as Bridge. You can also set an option to have Adobe notify you of
updates in the menu bar (New!).
Checking for Updates
and Patches
Check for Updates Directly from
the Internet
Open your Internet browser.
Go to the following Web address:
www.adobe.com/downloads/
updates/
Click the Product list arrow, and
then click the Photoshop -
Macintosh or Photoshop -
Windows.
Click Go.
Any updates or patches appear in
a list.
Based on your operating system,
follow the onscreen instructions to
download and install the software.
IMPORTANT
Checking on your
own requires a computer with a
connection to the Internet. Since

some of the updates can be rather
large, it’s recommended you have
high-speed access.
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From the Library of Wow! eBook
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Chapter 1 Getting Started with Photoshop CS5 25
Check for Updates from the
Photoshop Help Menu
Click the Help menu, and then
click Updates.
Adobe checks your software with
the latest available version and
automatically updates it.
To ma nua lly c heck, cli ck th e
Check For New Updates button.
To ch ang e pre ferences , cli ck
Preferences, select the update
options you want, and then click
Done.
Click Quit.
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Did You Know?
You can deactivate or activate
Photoshop to use on another computer.
You can use your serial number on only
one computer at a time. If you’re mov-
ing from one computer to another, you
can deactivate your serial number on
one computer and then activate it
another one. Click the Help menu, click
Deactivate, click Suspend Activation
(saves serial number) or Deactivate
Permanently (removes serial number),
and then click Done. To activate it,
click the Help menu, click Activate, and
then follow the instructions.
You can complete or update your
Adobe ID profile.
An Adobe ID allows
you to access Adobe online services.
To complete or upda te your Ado be ID
profiles, click the Help menu, click
Complete/Update Adobe ID Profile, and
then follow the online instructions.
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26 Chapter 1
Getting Help While
You Work
Get Help Information
Click the Help menu, and then
click Photoshop Help.
TIMESAVER
Press F1 (Win) or
A
+/ (Mac).
The Adobe Community Help
window opens, displaying
product help information.
Click Help categories (plus sign
icons) until you display the topic
you want.
Click the topic you want.
Read the topic, and if you want,
click any links to get information
on related topics or definitions.
When you’re done, click the Close
button (Win) or click the Adobe
Help menu (Mac), and then click
Quit Adobe Help.
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Did You Know?

You can get help with Photoshop
through the Internet.
Click the Help
menu, and then click Photoshop Online
(requires an Internet connection) to
display Photoshop help resources from
all over the Web.
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Click to collapse/
expand panel
Click to open
help in a PDF
At some time, everyone has a question or two about using a program.
When you start Photoshop Help, the Adobe Community Help window
opens (New!), displaying help categories and topics. You can search
product help from Local Help, Community Help, or Adobe.com by using
keywords or phrases or browsing through a list of categories and top-
ics to locate specific information. Local Help accesses product help on
your local computer, Community Help accesses product help online,
and Adobe.com accesses related help information on Adobe.com.
When you perform a search using keywords or phrases, a list of possi-
ble answers is shown from the search location with the most likely
responses at the top. Along with help text, some help topics include
links to text and video tutorials. In addition, comments and ratings from
users are available to help guide you to an answer. You can add feed-
back and suggestions by signing in to Adobe.com using an Adobe ID.
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From the Library of Wow! eBook
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Chapter 1 Getting Started with Photoshop CS5 27
Search for Help Information
Click the Help menu, and then
click Photoshop Help.
The Adobe Community Help
window opens, displaying
product help information.
To se arc h ano ther CS pro duc t,
click the Select Product list arrow,
and then select a CS product.
Type one or more keywords in the
Search box, and then press Enter
(Win) or Return (Mac).
To re fin e a sea rch, click Search
Options to expand it, and then
select any of the following options:
◆ Search This Help System Only.
Select to constrain the search
to the selected product.
◆ Search Location. Select Local
Help, Community Help, or
Adobe.com.
◆ Filter Results. For Adobe.com,
select a filter option.
Click the link to the topic you want
from the search list of results.
◆ What’s New. Click the plus sign
(+) next to Resources, and then

click What’s New.
Read the topic, and if you want,
click any links to get information
on related topics or definitions.
◆ Next and Previous Topics. Click
the Previous or Next button on
the right side of the Help web
page.
When you’re done, click the Close
button (Win) or click the Adobe
Help menu (Mac), and then click
Quit Adobe Help.
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Participating in Adobe Product Improvement
You can participate in the Adobe Product Improvement Program. Click
the Help menu, click Adobe Product Improvement Program, and then
follow the onscreen instructions. This is an opt-in program that allows
you to test Adobe products and make suggestions for future products.
This program enables Adobe to collect product usage data from cus-
tomers while maintaining their privacy.
For Your Information
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Search results
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