freeship and curvature

Freeship seems to be a great user friendly program. I have just installed the latest version 2.6, and for some reason I cannot view the curvature of a design that I am working on. It must be a simple thing but I cannot find what I am doing wrong. Any ideas?

 

To check curvature of WL, Sections, Buttocks...go to: Calulations/Intersections and when the screen shows click on the squares besides the section number, close the window, and now click on the "curvature plot" Icon.

And for surface check, right click on any place on the screen, then go to "MODE" and choose from there.

 

thanks

Thanks CGN.