Adobe Creative Suite 4 (CS4) was announced on September 23, 2008 and officially released on October 15, 2008. All applications in CS4 featured the same user interface, with a new tabbed interface for working with concurrently running Adobe CS4 programs where multiple documents can be opened inside multiple tabs contained in a single window.
Adobe CS4 was also developed to perform better under 64-bit and multi-core processors. On MS Windows, Adobe Photoshop CS4 ran natively as a 64-bit application. Although they were not natively 64-bit applications, Adobe After Effects CS4 and Adobe Premiere Pro CS4 had been optimized for 64-bit computers. However, there were no 64-bit versions of CS4 available for Mac OS X. In early testing of 64-bit support in Adobe Photoshop CS4, overall performance gains ranged from 8% to 12%, due to the fact that 64-bit applications could address larger amounts of memory and thus resulted in less file swapping — one of the biggest factors that can affect data processing speed.
Two programs were dropped from the CS4 line-up: Adobe Ultra, a vector keying application which utilizes image analysis technology to produce high quality chroma key effects in less than ideal lighting environments and provides keying of a subject into a virtual 3D environment through virtual set technology, and Adobe Stock Photos. Below is a matrix of the applications that were bundled in each of the software suites for CS4:
|Adobe Creative Suite 4|
|Photoshop CS4 Extended|
|Acrobat 9 Pro|
|Flash CS4 Professional|
|After Effects CS4|
|Premiere Pro CS4|
|Shared features, services, and applications|
|Device Central CS4|
|Version Cue CS4|