I discovered that I could change the layout from horizontal to vertical by moving the shape of my browser around. That was cool. But now I want the layout of my lists to go back to horizontal and I have not discovered a way to do this. When I make my browser smaller, they become vertical, when I make my browser bigger, they stay vertical and do not return to the original horizontal layout. How do I change them back to the original way they were?
The Trello layout should automatically adapt when you change the size of the window.
If you find that it is stuck (for some reason), try refreshing the page.