Thanks for your reply.
I just wanted to show the starting point of helical groove from the centerline. If we have development length of the cylinder it is easy to show. Unfortunately I dont have a sketch right now, I will try to post you by tomorrow. However is it possible to have development length of cylinder in NX? similar to flat pattern? How do we create for this particular file.
It is similar to the section you have shown, but I wanted to show only upper half of the cylinder by taking section on the outer periphery. Is it possible to have such section in NX9?
If yes, please help. Let me know if you need any additional information.