DigiTech CONTROL 2 Owner's Manual page 19

Using the Control 2 Remote Foot Controller
The Min and Max values are automatically updated with the selected
parameter's defaults. You can also edit the Min and Max values to customize
the parameter range for your needs using the Edit/Select knob.
Changes must be stored using the GSP's Store procedure. Consult your GSP
documentation for more information about storing changes to presets.

Control 2 Owner's Manual