for example we take the 2D parametric function
x=t*cos(t)
y=t-sin(t)
To plot the parametric function y(x), the user, input the command line: Plot:y(x),t,0,tf
Where: tf is the total time.
This mean to plot the parametric function y in function of the variable x where the local variable t varies from t=0 to t=tf . Example is given below in the custom design component