This depends on the airport you are viewing. The FAA only produces airport diagrams for about 800 airports so not all airports will have a dedicated airport diagram. There is a Kneeboard format however, that contains a mini-diagram along with other common information for the airport that can be printed. There is a blue button at the bottom of the Overview section for printing that format (see screenshot below). For any of the 800+ airports that the FAA publishes an official airport diagram for, they are already in a kneeboard size and can be printed by clicking on the diagram at the top of the airport details page (if there is one) or from within the Procedures section a little further down the page. Again, you will only see an airport diagram for the 800+ airports that the FAA publishes one for.
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