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Tips:
• For transparent True Color or Grayscale PNG images used for a Web page, there
is no need to choose a mask option. This is because these types of PNGs
inherently come with a mask. Yet, the file size could be large and might not be
displayed properly in some browsers.
• For transparent indexed PNG images used for a Web page, they share the same
characteristics as indexed transparent GIF images.
Testing your files with different settings
The Batch dialog box in Image Optimizer allows you to try out different color and
compression settings on the JPEG, GIF, and PNG files before these files are actually
saved. Here, you can quickly experiment with the variables that affect these image
file formats the most. The Batch dialog boxes for both GIF and PNG test the
number of colors, while the Batch dialog box for JPEG tests the extent of
compression.
To perform a batch test:
1. Click Batch in the Ulead Image Optimizer dialog box.
2. For GIF and PNG, enter the lowest number of colors to test in Fewest colors.
For JPEG, enter a percentage (0 to 100%) of compression in Lowest quality.
3. Similarly, for GIF and PNG, enter the highest number of colors to test in Most
colors. For JPEG, enter a percentage of compression in Highest quality.
4. Select either Number of tests to perform a specific number of tests or
Increment to perform a single test for every increment of 0-20 colors. If you
choose to have tests done by Increment, entering a smaller number of
increments will result in more tests being performed.
Note: For PNG True Color images, the Batch test is based on the Filter options and
is automatically performed for six times.
5. Click OK. Once the tests have been generated, you can view the results in the
Batch Results dialog box. Highlight a test result and click Select to apply the
setting into Image Optimizer's preview window.
Objects for the Web
In addition to the background, a Web page comprises objects such as images,
hyperlinks, text and so on. You can create these using PhotoImpact's versatile Web
tools and its WYSIWYG interface, where all objects you see in a document remain
in the same position when viewed on its exported Web page.
CHAPTER 8: ALL FOR THE WEB 271
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