Adobe PHOTOSHOP 6.0 Manual page 344

CHAPTER 12
334
Optimizing Images for the Web
To select colors based on a selection in the image
(ImageReady):
Make a selection in the image using the
1
selection tools or the Select menu commands.
Choose Select All From Selection from the
2
Color Table palette menu.
To select all colors:
Choose Select All Colors from the Color Table
palette menu.
To select all Web-safe colors:
Choose Select All Web Safe Colors from the Color
Table palette menu.
To select all non-Web-safe colors:
Choose Select All Non-Web Safe Colors from the
Color Table palette menu.
To view selected colors in an image (ImageReady):
Select the optimized image. Then click and hold a
selected color in the Color Table palette to tempo-
rarily invert the color in the optimized image,
enabling you to see which areas of the image
contain the color.
To view a contiguous group of colors, press Shift
and click and hold another color. All colors in the
rows between the first and second selected colors
are inverted.
To view a discontiguous group of colors, press Ctrl
(Windows) or Command (Mac OS) and click each
color that you want to select, and hold the mouse
button down on any color in the group.
To deselect all colors:
Choose Deselect All Colors from the Color Table
palette menu.
Editing colors
You can change a selected color in the color
table to any other RGB color value. When you
regenerate the optimized image, the selected color
changes to the new color wherever it appears in the
image.
To edit a color:
1 Double-click the color in the color table to
display the default color picker.
2 Select a color.
A small black diamond ( ) appears in the center
of each edited color. The edited color replaces the
original color in the image.
Note: Editing a color also locks it—a white square
appears in the lower right corner of the color.
(See "Locking colors in the color table" on page 335.)
Shifting to Web-safe colors
To protect colors from dithering in a browser,
you can shift the colors to their closest equivalents
in the Web palette. This ensures that the colors
won't dither when displayed in browsers on either
Windows or Macintosh operating systems capable
of displaying only 256 colors. (See "Previewing
and controlling dithering" on page 341.)