Trim Feature in Catia Part design?

Hello, I'm working on getting my mechanical design for students' certification. I am unable to find the trim function mentioned in the tutorial. I was able to find a remove function, but it does not work on the intersecting objects. Is there a way I can resolve this issue. I am referring to the "create surface geometries" video in the "Explore the Mechanical Design Role" learning module. 

Edu Part Design ​​​​​​​