Adobe Photoshop 6.0 User Guide

274 CHAPTER 10
Designing Web Pages
Layer-based slices are especially useful when
working with rollovers. Start by placing the
rollover element on a separate layer, and then
create a slice from that layer. If you apply an effect
to the layer—such as a drop shadow or glow—
to create a rollover state, the slice automatically
adjusts to encompass the new pixels. However,
do not use a layer-based slice when you plan to
move the layer over a large area of the image
during an animation, because the slice dimension
may exceed a useful size. (See “Working with
rollovers (ImageReady)” on page 292.)
To create a slice from a layer:
1 Select a layer in the Layers palette.
2 Choose Layer > New Layer Based Slice.
Converting auto-slices to user-slices
You can move, duplicate, combine, divide, resize,
delete, arrange, align, and distribute user-slices.
You can also apply different optimization settings
to user-slices. In contrast, all auto-slices in an
image are linked and share the same optimization
settings. This is because auto-slices are regenerated
every time you create or edit a user-slice or layerbased
slice.
Converting an auto-slice to a user-slice prevents it
from being changed when regeneration occurs.
Dividing, combining, linking, and setting options
for auto-slices automatically converts them to
user-slices.
To convert an auto-slice to a user-slice:
1 Select an auto-slice. In ImageReady, you can
select multiple slices. (See “Selecting slices” on
page 276.)
2 Do one of the following:
• (Photoshop) Click Promote to User Slice in the
options bar.
• (ImageReady) Choose Slices > Promote to
User-slice(s).
Converting layer-based slices to
user-slices
Because a layer-based slice is tied to the pixel
content of a layer, the only way to move, combine,
divide, resize, and align it is to edit the layer.
You can convert a layer-based slice to a user-slice
to unlink it from the layer.
To convert a layer-based slice to a user-slice:
1 Select a layer-based slice. In ImageReady,
you can select multiple slices. (See “Selecting
slices” on page 276.)
2 Do one of the following:
• (Photoshop) Click Promote to User Slice in the
options bar.
• (ImageReady) Choose Slices > Promote to
User-slice(s).