Sorry if this should be obvious to me: Can I have a unified folder containing only individually-chosen folders from several accounts? In K9 on Android I can select one by one which folders from several accounts go into Unified view. Can I do that in Thnderbird itself? It looks like either I can do unified view, which unifies eg Inbox and Send but doesn't let me pick which others specific folders are included, or I can Favourites view which lets me pick folders but doesn't unify them. Can I do both? Many thanks.