I have not been able to find this, nor figure it out.

I ave a number of docks. I use them to easily find groups of documents. As time goes on, those groups are used less frequent. So I want to "move" these dock into a shelf (not creating a shelf from the dock, just placing the dock in a shelf, or in a dock already in the shelf).

I cannot figure out how to get my dock become a sub-dock of an existing dock, or to get it into one of the empty slots in a shelf, both should work if I could do it.

What is the way to achieve it?

--- Mats ---

Yo need to enable dock control icon in dock properties then use that icon to attach the dock as subdock (if i remember right)

you need to grab the icon itself (icons need to be unlocked) not the dock:
http://prntscr.com/hf2c4d


then you insert the icon where you want the dock to be subdock:
http://prntscr.com/hf2ci0

and now you have moved the dock to be a subdock of another dock (or shelf):
http://prntscr.com/hf2cs0

(for this i duplicated my dock to the left, then inserted the duplicate as the subdock of the original)

Ok, first make sure that the control icon (the Nexus icon as the very first icon in any dock) is on for the dock: Dock Properties -> Content tab -> enable 'Show dock control icon' setting.

The very first icon in that dock will now be a Nexus icon. It is this 'control' icon that you drag into another dock, as if you were drag & dropping an item from one dock into another.