Cadet brach coat of arms

[Starkman]

I created a cadet branch in my dynasty and i am marrined with one of karlings and i want to have karlings coat of arms on my cydet branch erb too. How can i do that?

[rossobianco]

I assume it is cadet branch quartering with karling CoA and your branch CoA?
If so, bad luck, as you can't do this the easy way by copy and paste, like e.g. switching players, copy their CoA and switch back and paste/edit.
You can either start from scratch in the CoA designer, which, given the complexity of the Karling CoA is near impossible, or you can edit your save game and copy and paste from another Karling branch which has Karling CoA quartering and then edit it in the CoA designer.
From the top of my head, I don't see any other possibilities.