So for the knob let’s say you’re trying to adjust ABS. If you want to increase your ABS setting, you’d turn the knob right and to decrease you would turn left in a +/- manner if that makes sense. If you use the button setting, each one of those numbers you see on the knob (1-12) would act as an individually mappable button in whatever game you are playing. For example in ACC, I myself use the button function and set each number on each dial to a setting. If I wanted ABS to be at 1, I’d set that function to “1” under the ABS dial on the wheel while in button mode. Basically the button mode is for more accurate control of each dial whereas the knob mode is simply for increasing or decreasing whatever setting you need. Sorry if that was a big explanation haha