The Extended edition includes all standard CS3 features plus specialized professional tools:

Even if you used the Standard edition, CS3 brought revolutionary productivity updates: Adobe Photoshop version history.md - GitHub Gist

Includes a Measurement Log palette to calculate image values, a Scale Marker for technical graphics, and a Count Tool for tallying objects by clicking.

Adobe Photoshop CS3 Extended, released in , marked a historic expansion of the industry-standard software. Codenamed " Red Pill ," it introduced specialized tools for 3D, video, and scientific analysis that were previously unavailable in the standard version. Top Features of Adobe Photoshop CS3 Extended

Enhanced to allow measuring in perspective and exporting meshes to 3D formats like DXF or VPE for After Effects.