In the help documents I was sent leading up to this change, it said that I would be able to forward ALL emails from one account to another. I can forward the inbox emails, but I can't find a way of forwarding the junk emails from my secondary account to my main account. Preferably, I would like to forward the junk emails from my secondary account to a separate folder in my main account.

How do I do this? I don't want to constantly log out of one account and then log in to the other account all the time.
Many thanks.