Question About the new featur

[snow79]

Hi all PPL i have see and read the new features inside VirtueMart 2.0.2

i have a little question, in the features is write:
•Automatic child customfield product displayed in a the parent product as a dropdown list

how i can enable this? because i have install this version, but my shop don't have change, all product, parent and child are in the same page, and if i open the father product i don't see any chil product

some one can help me please?
TOO TNK ALL