One of the new features in Inventor 2012 is the Marking Menu. Some people are going to say they hate it and others are going to say they love it, myself, I think it is a great added feature. Being as how the Marking Menu is contextual, it changes what is in the menu by what environment you are in. Here are what are in the Marking Menus.
Also, each Marking Menu can be modified to change the commands that are in each one.