User Guide

The Web398
Segmenting a large graphic into
smaller, optimized image files can
reduce load time while letting you
control the resulting image quality.
The Image Slicer supports these
export options:
•GIF
•JPEG
• TIFF (for lossless export to other
graphics applications)
•No Export
For example, one part of your image
might contain a photo; a second, a
graphic image; and a third, some text.
With the Image Slicer, you can:
• export a photo area (where color is
most important) to the JPEG file
format
• export a flat-color slice (which will
look fine in 256 colors or less), to
the GIF file format
• export nothing at all for a slice that
contains text only (opting instead
to code the text in HTML)
You can optimize each slice in your image,
depending on content.
Deciding When to Slice
Images
The Image Slicer plug-in is most
useful when your image contains
rollovers. For more information, refer
to “Creating Rollovers from Image
Slices” on page 404. Image mapping,
in contrast, is most useful when you
want to define multiple clickable links
within a single image. For more
information about image mapping
support, refer to “Image Maps” on
page 406.
Use image slicing if:
• your image includes areas that
feature rollovers.
• one or more areas of your image
(for example, flat color areas) can
be significantly more compressed
than other areas. Use the Image
Slicer and set export options
accordingly.
• you can replace some areas of your
image with pure HTML elements,
like text, form elements, or table
cell backgrounds.
• the image must reappear on many
pages, with small changes on each
page (as with a navigation bar).
The browser caches most of the
common slices, which can help
performance.
• you want to create different links
for different areas of your image.
Understanding the Image
Slicer
You don’t have to know HTML or
JavaScript™ to create a sliced image
because the Corel Painter Image
Slicer plug-in generates it for you.