Fuel Tuning

[Horizons1]

I just have a quick question about tuning fuel. When I'm in the tables screen and adjusting fuel duty in the low cam, and i hit the smooth the curve selection, a few of the boxes light up red or a different shade of green. I'm just trying to figure out what they mean. I tried to find it in the help section but no luck.

[Spunkster]

The colors just indicate whether the values have ben adjusted up or down from the original value.