Start by locating the Board you want to duplicate, hovering over the Board, and selecting the three dots that appear beside the name of the Board.
Click "Duplicate".
From there, a new Board will be created. It will be an identical copy to the Board you duplicated, and the name of the new Board will be set to automatically reflect that. You can change the name of the board at any time.
If you have any further questions, our support team would be more than happy to help!