Graphics Reference
In-Depth Information
Optimizing a PNG-8 Document
The PNG-8 file format is used primarily for images that contain solid colors with sharp
edges—clip art, text, line art, and logos—and was designed as an alternative to the GIF
file format. Since the PNG-8 format generates an image with a maximum of 256 colors, it
significantly reduces an image's file size. While similar to the GIF file format, the PNG-8
format is not completely supported by older browsers. However, it is considered a native
format for the creation of Flash animation movies.
Optimize a PNG-8 Document
Open a document.
Click the
File
menu, and then click
Save for Web
.
Click the
Original
,
Optimized
, or
2-Up
tabs to view the document using differ-
ent layouts.
Click one of the sample images to change its default format.
Click the
Optimized File Format
list arrow, and then click
PNG-8
.
Select from the following options:
Color Options:
•
Reduction.
Click to select a visual reduction method for the colors in the im-
age.
•
Colors.
Enter or select a value from 2 to 256 maximum colors.
•
Web Snap.
Enter or select a value from 0% to 100% to instruct the PNG-8
compression utility how many of the image's colors should be web-safe.
