This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Windows, Preferences, Workbench, Keys gets you to a form where you can see all the key mappings. Of course it's possible that you were watching a person who had modified those key mappings, or who had loaded a plug-in that you don't have in your system, and so on. Pity you didn't ask "How did you do that?" at the time.