When using Internet Explorer there is an option to Print Target on the context menu that appears when you right click on the file name. This will print the file concerned.
If you wish to print text which is in Blackboard rather than within a file follow these steps:
If you find that the course menu gets in the way then make use the widescreen button.
This shows the content area without the course menu beside it. When you print from this screen you will not print the course menu.