You can see it here, in the centre of this image from the car's instruction book... only one arrow will appear at a time (page 37 of the book, and the RHD version from the very back of the book, which shows the symbols in slightly different places for some reason!)
Incidentally, if you press the 'trip' bottom on the end of the wiper stalk, you can scroll through various bits of info that get shown on the top line (where the date is in the image below). One is instantaneous fuel consumption which will show you when the car is using the fuel most.