Concrete net volume in partlist and rebar bending cells

Hello, 

I am using CE 5.2 version. I have question about concrete net volume in partlist. In partlist showing only gross volume, how i can change to net volume?

This is mine testing file. 

And where I can get rebar bending cells from video?

https://youtu.be/QP1Hqir94Xg?t=787

Thank you.