Consump. selection (under the Fuel Consu. Disp) won't work

I've seen some threads about people having trouble with this - I adjusted the dealer set mpg to compare my car to for eco savings, but now I want it set the way it was before, so it shows the cost of each trip I take. I want to be able to use both, to see savings when its set on eco savings, and cost when it is set on consump. But both selections now are giving me savings. Can anyone help me before I take it to the dealer?

I have a Prius Four, not IV, 2013.

 

Thanks but I didn't find it in the manual, however I did find a comment in another thread that helped. The comparison consumption does not set to 0, .1 is the lowest. What I did to fix it (suggested in another thread) was go to the bar graph and hold down the trip button.