…that’s probably what Mark was thinking when he sat down at his desk several weeks ago. The result was an extension that made GC Wizard even more valuable: tabbing.

Although the clipboard provided excellent support for using different tools, each tool still had to be opened one after the other.
With tabbing, multiple tools can now be used simultaneously. In other words: GC Wizard can now multitask.

You can find a detailed explanation in the online manual under User Interface: Tabbing