Thunderbird will let me rename my primary account with the name of the sub-account (which confused me for quite a while), but I simply want to switch *between* the two accounts. That is, I would like to view the emails received by the primary account, and then, subsequently, change/switch to viewing the emails received by the sub-account. I would like to do these two separate things at will. I am currently unable to do so, and cannot figure out how to. can you help?