Mailbox folders are hidden in Mail 12.2

[Morod]

I know my mailbox folders are still around because I can access them from the pull-down menu the Move box in the tool bar of Mail. They just don't appear in the sidebar of Mail anymore. Anyone know the answer to this riddle of how to restore my mailboxes to Mail's sidebar?
Thanks!

 

[chscag]

Hover your cursor to the right of "On My Mac" and you should see the small word "show". Click on that and your mailboxes will reappear.

 

[Morod]

Thanks, chscag! It worked perfectly.
My problem was I kept clicking on the + sign, which added a mailbox. I should've been clicking on the Show instead.