Printing multiple parameters in Crystal

I have a Crystal 8.5 report that I created. It allows the user to
enter multiple values for a parameter for the department code. When I
add the parameter field to the report heading it only prints the first
value. How do I get it to print all the values? I understand that a
multiple value parameter is saved as an array but I'm not sure how to
pull out the individual values. Thanks in advance for any help you
can give me!