CST - How to twist design in CST studio?

Hi, I am new in CST so I need your help.

I want to make twist design WR90 and I designed WR90 but I don't know how to do twist shape. Could you help me?

* ex: https://flann.com/wp-content/uploads/2015/09/Series-450.pdf

CST Studio Suite ​​​​​​​