In reply to Bobbie Wagoner.

Hi Bobbie, yes your right for the viewer we can roll back to modern view. Thanks
The problem is only for the hub that if I set to classic view then I don't have the preference menù (or I haven't see it).
A workaround that I found is edit the value in SharedServices DB and remove the entry for the user where is set home.ui.mode = classic.
Not very user friendly but it seems work. :)
A.