Adobe 13101332 - Photoshop - Mac User Manual page 425

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percentage across an image. This technique produces higher-quality results in critical
image areas without sacrificing file size. (See
page 428.)
Note: Diffusion dither may cause detectable seams to appear across slice boundaries.
Linking slices diffuses the dither pattern across all linked slices, and eliminates the seams.
Pattern applies a halftone-like square pattern to determine the value of pixels.
•
Noise applies a random pattern similar to the Diffusion dithering, but without diffusing
•
the pattern across adjacent pixels. No seams appear with the Noise algorithm.
Saving and resetting optimization settings
You can save optimization settings as a named set and apply the settings to other images.
Settings that you save appear in the Settings pop-up menu, together with the predefined
named settings. If you edit a named set or a predefined set, the Settings menu displays the
term "Unnamed."
In Photoshop, after you optimize an image, you can return to the artboard without losing
your settings. When you choose the Save for Web command again, the optimization
settings are just as you left them.
To save a named set of optimization settings:
1 Set optimization options as desired, and choose Save Settings from the Optimize
pop-up menu (Photoshop) or the Optimize palette menu (ImageReady).
2 Name the settings, and save them in the Presets/Optimized Settings folder inside the
Photoshop program folder.
Note: If you save the settings in a location other than the Presets/Optimized Settings
folder, they will not be available from the Settings pop-up menu.
To edit a named set of optimization settings:
1 Choose the named set from the Settings pop-up menu.
2 Edit the optimization settings as desired. The Settings menu will display the term
"Unnamed," since the settings no longer match a named set.
3 Choose Save Settings from the Optimize pop-up menu (Photoshop) or the Optimize
palette menu (ImageReady), and save the settings with the name of the original set.
To delete optimization settings:
1 Choose a named set or predefined set of optimization settings from the Settings
pop-up menu.
2 Choose Delete Settings from the Settings panel menu.
Note: You cannot restore deleted settings, so use the Delete Settings command with care.
To save the current optimization setting (Photoshop):
Do one of the following:
To save the settings and close the Save for Web dialog box, click Done.
•
To save the settings without closing the Save for Web dialog box, press Alt (Windows) or
•
Option (Mac OS), and click Remember.
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Preparing Graphics for the Web
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