Adobe PHOTOSHOP 5.0 User Manual page 326

318 CHAPTER 14
Saving and Exporting Images
For a color illustration of images saved as
GIF, see figure on page 235.
Note: To assign transparency to specific colors in the
image, convert to indexed-color mode before
exporting to GIF. See "Exporting indexed-color
images to GIF" on page 319 for more information.
To export an RGB image to GIF:
To create background transparency, select the
1
foreground object of the image. Copy the selection
onto a new, transparent layer. Be sure to hide any
layers you don't want included. (See Chapter 11,
"Using Layers.")
Original, and selection copied to transparent layer
Choose File > Export > GIF89a Export.
2
3 Select a background transparency preview:
To preview the background transparency as the
•
gray background color used by most Web
browsers, leave the Transparency Index Color box
at the default color.
OVERVIEW: PREPARING IMAGES FOR
ONLINE DISTRIBUTION
Create and composite the image in
1
Adobe Photoshop, and apply color
correction to the image (Chapters 6–12).
Determine the display dimensions for the
2
on-screen image, based on the monitor
resolution and file size needed for the
image (Chapter 3).
For PDF distribution, save the file as PDF
3
or export to a page-layout application,
and convert the final file to PDF. For
HTML distribution, save the file in JPEG
format (page 317) or export the file in
GIF89a format (page 317), depending
on your display requirements.
For the GIF89a Export module, choose
4
the number of colors and assign
background transparency.
To preview the background transparency as a
•
different color, click the Transparency Index Color
box. Choose a color, as described in "Using the
Adobe Photoshop Color Picker" on page 218, and
click OK.
Note: The Transparency Index Color is used only to
preview the background transparency, and does not
affect the final appearance of the file.
Transparency previewed as default gray, and as blue