An example of a neurostimulation system may include a storage device, a programming control circuit, and a graphical user interface (GUI). The storage device may be configured to store a stimulation waveform representing a pattern of neurostimulation pulses. The programming control circuit may be configured to generate stimulation parameters controlling delivery of the neurostimulation pulses according to the stimulation waveform. The GUI may be configured to define the stimulation waveform as a function of one or more adjustable parameter curves each being a function of time. The one or more adjustable parameter curves each represent a user-programmable parameter. The GUI includes a waveform definition module that may be configured to present the stimulation waveform, present each parameter curve of the one or more adjustable parameter curves, allow for adjustment of the each parameter curve, and update the stimulation waveform in response to the adjustment of the each parameter curve.
