I found this in the help: "On the left side you see a hierarchical list of all folders in your mailbox." I swear yesterday, I did see all of them, because I was able to drag and drop emails there directly. But today I do not - I just see Compose, Mail, Contacts, Calendar, Settings, Webmail Home, Dark mode, About and Logout. I have Mail selected, and I can click on the folder icon and see all my folders instead of my emails, which doesn't help for dragging and dropping either. I want to see a vertical panel with my folders, and another with my email. How did I inadvertently turn that off, and how do I turn it back on?
Thanks, Lynn