Question about 3D Forward Simulation with User-Defined Waveforms

Hi all,
In this example “3D Forward Simulation with User-Defined Waveforms”, how can we set the current or coil size?
According to the example, the generated electromagnetic response data ranges from 10^-16 to 10^-11 T. How can we make the numerical range larger, around 10^-5? :melting_face: