Help Needed about Drawing Class Diagram

Hello, I have encountered a problem about modeling class diagram.
As my classes are seperated by packages, if I keep it with the package and class hierarchy, I find I cannot show the relationship among those classes. And I will have many many diagrams depend on the package amount. I should model one big big diagram to include all the classes in it or I should leave it just as I did?
Or is there any better get-around to this?
Thx alot

Just use your class diagram and show the relationships between the classes without regard for the packages. Create a separate package diagram where you group the classes. Create a separate class diagram for each area if you need to show additional detail.