If you have finished a project and you would like to archive a Board -> go to the main Dashboard, where all your projects and boards are located -> click on the Board Settings (the dotted icon) that belongs to every Board -> select Archive Board.
Click on "Yes" to confirm the action and your board will be archived.
You can access your archived projects and boards anytime. Go to the Administration Panel -> select Archived Projects and Boards tab.
There you can find the following information on the archived projects and boards: project name, board name, the user who archived it and the date the archiving occurred.
If you want to restore an archived board, go to the Archived Projects and Boards tab of your Administration Panel and click on the Unarchive icon of the corresponding board.
Note: You can only archive boards and projects, but you can not delete them.
Learn how to archive a project.