CS4 was released in October 2008. It features a variety of improvements to old tools along with the introduction of a few brand-new tools acquired from FreeHand. The ability to create multiple artboards is one of CS4's main additions from Freehand. The artboards allow you to create multiple versions of a piece of work within a single document. Other tools include the Blob Brush, which allows multiple overlapping vector brush strokes to easily merge or join, and a revamped gradient tool allowing for more in-depth color manipulation as well as transparency in gradients.