How to plot UPFC controlable region ?

Hi

i need to plot UPFC controllable region but i dont know how to do it ? could anyone please provide any suggestion for me ? to realize what i mean by this question you may see this example provided by MATLAB write this in command window :

    power_upfc

it has a part which plot what i need but i dont know how did that , could anyone help ? another question i have is that anyway to use phasor type of a model in discrete mode of power_GUI ?

thanks