Currently it is only possible to inherit all of the attending items of the parent conference. This is the case when a co-located conference is set to have the parent’s view context (set in general data).

From Jan:

Is there a way to share some (but not all) of the “Attending” menu across co-located events.
There are things like the Registration page and the Hotel page that should show up in all the co-los.

Submitted by Elmer van Chastelet on 5 January 2016 at 07:30