On the G1 (and I assume GH1 and GF1 as well) you can tweak the various 'film' modes of standard, nature, dyanamic etc. by altering four parameters: Contrast, Sharpness, Saturation and NR.
The sliders indicate a range from -2 to +2. Default is 0.
The question is have is if you want to TOTALLY zero out (i.e. turn them off) any of these parameters do you leave "0" or to slide it "-2"?