In my main email account, I have many folders each with munerous sub folders. In TB for PC, these sub folders can be collapsed into their main folder but in Android, it shows all the folders and sub folders all the time and I can find no way to collapse these sub floders into their main folder. I am a great fan of TB for PC and have used it since the start but android is not so user friendly so may have to go back to G-Mail or Outlook, both of which have the ability to collapse sub follders into the main folder. Can someone help me please.