EFX Parameter Adjust on RZ Controller?

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Is there any way to adjust the main EFX settings for the effects assigned to the RZ FX rotary knobs & Colour FX knobs?

The current efx settings are quite (very) harsh and could be smoothed out you were able to adjust the parameters as you can with the same effects when they are assigned to the Midi Pads?

Seems odd that some effects can be 'edited' and others can't on the unit?

K