I think (again) I'm asking the impossible...

Is it possible to give more than one Admin rights to Upload / Modify more than one Album *without* giving them rights to all?

For example: -
* "Rail" is viewable to the world and can be modified by Admin "A" and Admin "B" (but not Admin "C" or "D")
* "Water" is viewable to the world and can be modified by Admin "B" and Admin "C" (but not Admin "A" or "D")
* "Road" is viewable to the world and can be modified by Admin "D" (but not Admin "A", "B" or "C")

The only controls I can see in the Back End are "Owner" within each Album (which I assume means the owner has access) and "Manage All" (in the Admin User tab) which does what it says.

I wouldn't ask, except https://www.zenphoto.org/news/user-rights/ mentions *managed object lists* which sounds exactly what I'm looking for, but I can't find where *managed object lists* are managed...

Thanks (as always)

The managed objects lists are found on the the individual user accounts. The user must not have "manage all" rights in the album rights section, then you can assign albums (only toplevel!) to manage.

Ah (facepalm moment)! - I couldn't see them because I am "the master account" therefore I didn't have any options!
Thanks (once again)...