How to restore Real Time plot back to plotting position from panning effect in Processing??

I have used processing software to acquire real time data from serial communication in Arduino.

I have used the grafica library to add data visualization features such as panning, zooming and rotating etc.

My question is once I have activated the panning effect and I have used a separate key pressed command to deactivate panning, yet I cannot restore the plot to the current point plotting position. How can I achieve that ??