Is there a way I have not seen to set permissions for a user group in backend for a given part of the page tree, example:

root
   news
      News1
   otherpages
       Otherpage1

If I go to users->User Permissions, I can see the checkbox "replace sub elements permissions", which makes sense.

Question is: how do I open the file tree here ? I can only change for each site (root page above), not for sub levels like "news" section. There is a javascript openContent(@id) but it does not do anything.

Is this a bug or is it by purpose not possible to select subpages in user permissions ?