Q: How do I activate Adobe Illustrator CS4 with a serial number? A: During installation, enter your serial number and follow the on-screen instructions to activate the software.

If you already own the software, here is how you can find your unique serial number: Official Retrieval Methods

: The Blob Brush tool enabled artists to create complex, filled shapes that could be easily merged or subtracted from one another. The Eraser tool allowed for quick and intuitive editing of paths and shapes.