Is it possible to choose transition curve in OpenRail ConceptStation ?

Hello,

May I ask if it´s possible to choose which type of transition curve is ConcepStation using ? 

Can I set parameters for this curve ? 

In program, all I can see is a "space" for transition curve but no parameters at all and I don´t know which type is ConceptStation using. 

I would like to use cubic transition curve, is it possible to choose it somehow ? 

Thank you for your advices. 

Have a nice day !