In most software categories, there are programs that set the standard for others. These applications are occasionally leapfrogged by the runners-up, but rarely do they give up their leadership position for long. In the realm of vector graphics tools, Adobe Illustrator 9 leads the pack. Illustrator 9 offers substantial improvements and new features for the graphic designer. To start with, Adobe lets us control the opacity of an object or a group (not a layer). Along with this new transparency palette, there is control of blending modes, or exactly how layers interact with one another. If you're familiar with Photoshop's blending modes, you should feel right at home here.
The structure of the layers themselves has greatly improved. Not only does Illustrator 9 support layers, but each layer can break down into sublayers. A great new command that takes advantage of this is Release to Layers. This takes a group of selected objects that currently exists on one layer and breaks each one down into its own sublayer. These sublayers are grouped under the layer icon in the layer palette.
Appearance Attributes offers a way to alter the look of an object without changing the underlying object itself. This is an ideal method of working, as it allows a designer to edit objects without being forced to reapply filters and other effects. This kind of creative freedom allows for faster changes and increased flexibility. It nurtures a "try-this, try-that" experimental attitude, since changes can be made with impunity.
Illustrator 9 offers a deep and expanded toolset, and any serious media designer should use it as one of the building blocks in his or her creative foundation. --Mike Caputo