The user interface in Photoshop CS3 Extended has been redesigned to provide a more intuitive and streamlined experience. The software includes a new Welcome Screen, which provides quick access to recent files, tutorials, and resources.

Photoshop CS3 Extended supports a wide range of plugins and third-party tools, allowing users to expand the software's capabilities and integrate it with other applications and services.

Photoshop CS3 Extended allows users to create and edit animations and videos, making it a versatile tool for motion graphics and video production. The software includes a timeline-based animation editor, which enables users to create complex animations and effects.