Because we built Trello to be a next-generation web and mobile application, it doesn't have great built-in printing support. While we do offer printing in the app, it's not a core feature of the app: http://help.trello.com/article/812-printing-in-trello
However, we are aware of a third-party extension that allows for printing from Trello, which you may want to check out:
Another option is to take a screenshot and print that - this way you print the board in the same way as you see it on your screen.
Hello Community! My name is Brittany Joiner and I am a Trello enthusiast and Atlassian Community Leader. I'll be sharing with you a series of videos with my top tips on how to best use Trello...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event