To change a board or its content, click on the item title, which allows you to change the details, and also completely remove it if necessary. What else? If you want to reorder items in a board, simply grab the item and drag it to where you want it, the other items will adjust accordingly. That is about it for content management, you can move on to @ziney-howto/sell, @ziney-howto/interact and @ziney-howto/discover to learn about more functionality!