It is possible that more than one of you has several email accounts in the Mail application and this, which is becoming more and more frequent among all users, can be a nuisance when looking at the emails that we have in each of the accounts, account by account. they. The truth is that the native OS X Mail application is still my application for managing emails to this day and sometimes I need to have two or three windows open to see the amount of emails that arrive in each of the accounts, so the best (in my case) is open a window for each email account and this is really easy to do with this keyboard shortcut.
It is so easy to do that it is interesting that all users know it, so from those who have just arrived on OS X to those who have been fiddling with the OS X Mail application for a longer time press alt + cmd + N to open another window and managing the different email accounts at the same time can be interesting.
In my case, what I do is lengthen the windows to see them on the Mac with the maximum width and narrow enough for three windows to fit on the screen and a desktop only for Mail. Then to close them we can use the cmd + W that is they close one by one, and also cmd + Q to close Mail. This will always depend on the size of the Mac screen and the tastes of each user, but in general terms and after trying several ways for my case the best thing is this way. We hope this simple tip can help you when it comes to manage email accounts simultaneously on Mac.