During the final laps of the GP Mclaren engineers radio'd the command, "Yellow G3, yellow G3" to Magnussen.

In other words, he was free to switch settings to "attack mode," and push hard to the end. But more specifically, do any huge Mclaren fans know how many maps there are or what each setting represents? Is Yellow G3 related to fuel specifically, or is it more than that (ignition timing, kers boost, etc)?

And is every team's terminology different for these fuel settings? Wonder if any have awesome titles like BEAST MODE, or um, yeah... something like that.