A method and apparatus for providing adjustment of current-related dispensing parameters in an electric dispensing gun. A control circuit receives user-selected inputs corresponding to dispensing parameters of the gun and converts those inputs into digital signals. The digital signals are applied to a digitally programmable driver circuit associated with the liquid dispensing gun to control at least some of the dispensing parameters of the gun. Diagnostic information pertinent to the operation of the dispensing gun is provided to the operator for evaluation and adjustment.