In FS goto the Learning Center>Index tab.....scroll down to Kneeboard. It will explain how to print various pages of the Kneeboard.
It appears you cannot print directly from the kneeboard.
Cheers, Dave
At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.
As already noted, one cannot print the kneeboard after starting the flight in FS9 The kneeboard_files are located in the FS9/Aircraft folder (or FS9/Aircraft/Specific folder) and can be printed as any other html webpage.
Personally, i would find printing the kneeboard redundant as our crews use the info directly from the FS9/kb -- online or offline resources
Here's some samples, including running Window's Media Player, viewing the King FS9 Videos in the Learning Center or viewing Acrobat Reader files in the kneeboard. Any online resource can be accessed from the kb.