Adobe Photoshop CS3 - Manual (Page 534)

PHOTOSHOP CS3
User Guide
527
Work with slices in the Save For Web & Devices dialog box
If your image contains multiple slices, you must specify the slices to be optimized. You can apply optimization
settings to additional slices by linking the slices. Linked slices in GIF and PNG-8 format share a color palette and
dither pattern to prevent the appearance of seams between the slices.
• To show or hide all slices, click the Toggle Slices Visibility button .
• (Photoshop only) To show or hide auto slices, choose Hide Auto Slices from the Preview pop-up menu.
• To select slices in the Save For Web & Devices dialog box, choose the Slice Select tool , and then click a slice
to select it. Shift-click or Shift-drag to select multiple slices.
Note: In the Save For Web & Devices dialog box, unselected slices are dimmed. This does not affect the color of the final
image.
• To view slice options in the Save For Web & Devices dialog box, select the Slice Select tool, and double-click a slice.
• To link slices, select two or more slices and choose Link Slices from the Optimize pop-up menu (to the right
of the Preset menu). The link icon appears on the linked slices.
• To unlink a slice, select the slice, and then choose Unlink Slice from the Optimize pop-up menu.
• To unlink all slices in an image, choose Unlink All Slices from the Optimize pop-up menu.
Compress a web graphic to a specific file size
1 Choose File > Save For Web & Devices.
2 Click a tab at the top of the Save For Web & Devices dialog box to select a display option: Optimized, 2-Up, or
4-Up. If you select 4-Up, select the preview you want to optimize.
3 (Optional) Select the slices you want to optimize and the file format you want to use.
4 Select Optimize To File Size from the Optimize menu (to the right of the Settings menu).
5 Enter the desired file size.
6 Select a Start With option:
Current Settings Uses the current file format.
Auto Select GIF/JPEG Automatically selects the optimal format depending on image content.
7 Select a Use option to specify whether you want to apply the specified file size to current slice only, to each slice
in the image, or to all slices. Click OK.
Resize artwork while optimizing
In the Save For Web & Devices dialog box, you can resize an image to specified pixel dimensions or to a percentage
of the original size.
1 Click the Image Size tab in the Save For Web & Devices dialog box.
2 Set any of the additional options:
Constrain Proportions Maintains the current proportions of pixel width to pixel height.
Quality (Photoshop only) Specifies the interpolation method. Bicubic Sharper generally produces better results
when you are reducing image size.
Anti-Alias (Illustrator only) Removes jagged edges in the artwork by applying anti-aliasing.