Compositing; Using The Object Inspector; Using Blending Modes - MACROMEDIA FIREWORKS 2-USING FIREWORKS Use Manual

Compositing

Compositing is the process of varying the transparency
or color interaction of two or more overlapping objects
to create a variety of graphic elements.

Using the Object inspector

Set opacity and choose a blending mode in the Object inspector.
Use the Object inspector to adjust the opacity of selected
objects and to apply blending modes. A setting of 100
renders an object completely opaque. A setting of 0
(zero) renders an object completely transparent.
Choose a blending mode.
Adjust opacity.

Using blending modes

Blending modes manipulate the color values of
overlapping objects to create effects. They also add a
dimension of control to the opacity effect.
Choosing a blending mode applies it to the entire
appearance of selected objects. Objects within a single
document or a single layer can have blending modes that
differ from other objects within the document or layer.
To set a default blending mode for newly drawn objects,
choose Edit > Deselect, then choose a blending mode.
When objects with different blending modes are
grouped, the group' s blending mode overrides individual
blending modes. Ungrouping the objects restores the
objects' individual blending modes.
A blending mode has four elements:
The color or colors of the object to which
Blend color—
the blending mode is applied.
The opacity of the object to which the
Opacity—
blending mode is applied.
The color of pixels underneath the blend
Base color—
color.
The result of the blending mode' s effect
Result color—
on the base color or colors.
Creating and Editing a Graphic 81